I think about this a lot. I've never satisfactorily answered it for myself.

Physically, I think that any in-person interaction involving the genitals or anus of at least one person with any body part or device held by one or more other people is sex. Vaginal and anal intercourse are obviously sex; I also think that blowjobs/cunnilingus are sex, handjobs/fingering are sex, pegging is sex, holding a vibrator is sex. (Remote-control vibrators aren't, at least for me. I think the people have to be in physical contact, or both simultaneously touching an object.) There's no such thing as "foreplay" to me. It's all sex. The idea that nothing is really sex except a penis in a vagina or ass is foreign to me, and also rather offensive. If sex is only penile penetration, then nothing two women do together is sex. If that were true, every lesbian in the world has never had sex, and my girlfriends and I have never had sex with each other!

I don't think sex needs to have the goal of either or both people cumming. It just has to be physically arousing (or at least intended to be) for at least one of the people involved.

In terms of relationships....

I don't require sex for love, and I don't require love for sex. I have multiple deep, committed, loving relationships; I also have multiple casual sex partners. When I was younger, I picked up people in bars and clubs, had one-night stands (heck, some of them were "two hours in the midafternoon stands"), and had NSA relationships right and left. I don't do that anymore; my casual sex partners are an ongoing presence in my life. We get together on a regular basis. We do have a relationship - and just because it's less serious doesn't mean it's less valid.

One of my partners is asexual; we literally never have sex. (We did a few times when we started going out, before he realized that I accepted him and loved him for who he was, and he didn't have to pretend anything or do anything he didn't like.) Some people have told me that if we're not having sex, we're "just friends." Um....no. We sleep together, we kiss, he gives me roses - it's a love relationship, as meaningful as those I have with my other partners. Lack of sex does not mean lack of love.

Sex is about connection for me. It's about sharing an intense experience with another person (or people). Connection doesn't have to be emotional; I'm not being romantic and dreamy about it. Raw passion is a form of connection, just as much as making love to a long-term partner whose body you know in and out is a connection. I'm most turned on by the look in the eyes of my partners, the expression on their faces if they cum, the sounds they make. Knowing that they're experiencing so much sensation, so much pleasure, with me - that I'm the reason they're feeling all this - that's the deepest satisfaction I can have. It turns me on to turn other people on. I'm fully pleased when I please them. Giving someone an experience that takes them out of themselves, raises their plane of existence at least for a while, overwhelms their body and mind - I can't imagine anything better than that. I love it. I really, truly love it.

I like it when sex feels good for me, too; but it doesn't have to. It certainly doesn't have to make me cum. I'm nearly anorgasmic, I can't cum from penetration at all, the only thing that works is direct clitoral stimulation, and all but 5 times in my entire sexual history, I have to be the one doing the stimulating. Basically, I masturbate during sex if I want to cum. I usually don't want to - trying for an orgasm is so unlikely to succeed, and so frustrating, that it just puts a lot of unpleasant pressure on me and takes away my enjoyment of the activities and interaction.

Don't get me wrong. Orgasms feel amazing. But I can give myself orgasms. I don't need another person for that. If there's another person with me - it's not about me. It's also not about them. It's about us.

 

Since this question has been brilliantly answered. I'm just gonna quote a musical artist.
SEX!!!!!!!
It's natural
It's chemical (let's do it)
It's logical
Habitual (can we do it?)
It's sensual
But most of all...
Sex is something we should do
Sex is something for me and you

Sex is natural - sex is good
Not everybody does it
But everybody should
Sex is natural - sex is fun
Sex is best when it's... One on one
One on one

 

I would imagine he had group sex at some point.

 

I think sex has become the greeting, and courting is what follows.. We have sex with people then we find out if we can trust them. Great sex is great, but being with someone you care about is even more important. Okay, the sex was good. Do I trust her? Do we get along? Are there things she does that bug the everloving shit out of me, and vice versa? Seems that finding the emotional before the physical has changed. We get the physical then look for the emotional..
Rant ended

 

Depends on the moment, every moment has a different meaning.

 

Depends on the moment, mood of partners, and many other variables. It can be sweet an sensual or hard and rough, marathon love making or a quikie before the kids come home. It can be revenge or connecting. What is sex it is many things.

 

Sex is something I do not have.

 

Sex is the sacred union of marriage. Well, that's my view of it ages ago.

Now... sex is.. that really depends on with whom you're doing it with.

 

It's weird because it used to be only us guys trying to go out there and get fucked. Now girls are on the same page. Girls have jobs they aren't all housemarms. They go out after work and want what they want.
"Did you guys have sex? Was it good"? Is not as important as "was there a connection"? I know I'm on a sex site and I like being here and talking to people, and I'm looking for maybe a hookup at most, at the least looking to talk about my fantasies. Its fun!! It's also getting more acceptable..
2nd rant over

 

Hi

 

Sex is Life, I can't live without it.

 

For some people.

 

It's a fiction of the imagination.

 

Sex is pleasure i wanna skeep with naked girls in wintry night and wanna try bdsm lick the boobs fuck the pussy make her cum

 

Yeah but my ego says everyone is just like me lol...

 

We have different definitions of "BDSM."

 

You can keep thinking that.

 

Sex is a three letter word. However, over years the approach to sex has changed drastically, from being practised mainly for procreation (as is still the case in the animal world), to the present where it is practised for mutual satisfaction and enjoyment between willing partners. The term "willing partners" has also changed, and now means the result of a consensual agreement between any two people, irrespective of marital status, gender, or even genetic relationship.

 

I believe sex is true intercourse, everything else is playing around and foreplay

 

sex is just getting off........making love is getting each other off ....better if at the same time