Well, to start off, it's not for everybody...
So to say "what is wrong with you?"
is the same as saying
"what is right with you?"
Some do and some don't, it's not something you NEED to do...

I am sorry you feel that way... Making love to someone who you truly love is a beautiful experience. Maybe you haven't met the right person yet?

well the issue is that my girlfriend are talking about kids and stuff, and i really care for her deeply, but i've always thought sex as this strange thing.... so i'm not sure how the whole kid things is going to work.... its just confusing

...and life is not confusing???
Welcome aboard.

Looking at your profile, it seems as though you've got a few other issues to work through. If your girlfriend is talking about kids, just make sure that you can be the right sort of father for them before you give up the contraception.

You might find that your feelings about sex change after you've spent some time in therapy, or maybe you'll find that you just don't want it that often - we're all different, after all. And yeah, sometimes what some people are into seems as weird as hell to me, but then maybe I seem like a weirdo to them ;)

Yeah, for a woman it starts out"usually" painful and bloody. But after that it's wonderful. If you both mesh well anyway. But hey if a woman can get over that and still love it. I'm sure you can get over the weirdness feeling.

Sorry...not sure why you are here? Like...trying to get past this feeling...or just wanting to vent? What do you need from us?

uh sex's point is to produce babies if you see it from the reproducing point of view......but normally sex is for pleasure.....and if you dont get pleasure from it then idk wtf to tell you...

and btw are u virgin or non virgin?

Personally, I think of sex/making love as an emotion driven pleasure.

Sex is just a release that gets rid of stress, etc for me the same way that a couple drinks would.

Making love is an emotional bond that you share with someone. There is a sense of peace that comes when you can synchronize the rhythm of your love making with someone you love and for me that equals pleasure.

I see from your profile that you feel that you are emotionless and cold. That said could be why you break down sex to an analytical view and find it just messy, etc. so until you get past that you may not relate to the pleasure it can bring.

Good luck, hope you find a way to allow yourself the messiness that come with emotions and sex.

If this is the way you are presently thinking, give a kid a break, DON'T just do it for your girlfriend, I would hate to hear later that a kid is not loved because you don't know what to do...
There are TOO many kids out there that don't get the love they need, because of uncertainty of the parents. Too many divorce cases that kids get punished by.
It's always the kids that lose.
Think before you go that way if you decide to go that way, don't just do it because your girlfriend wants some...You also have to commit yourself to this.
THINK OF THIS.

Excellent advice Bikeman.

Very good advice bikeman.

I didn't cover the other replies so maybe someone said this. I don't think sex is the issue, I think it may be one of many other things going on with you. Sex is really the last thing you should be worried about right now. If you don't enjoy it, then... you just don't! That doesn't make you abnormal, it makes you you. I wouldn't stress about it.

once you have it youll be saying "whats the use in not having sex. i dont really see the point in not having a fuck buddy"

lol.