Friends with benefits

It’s an odd term; I mean, what other benefits could you have from a friend? Don’t they already give you all of them? They’re there for you when you need someone to lean on; they’re there for you when you need a helping hand; and they’re there with you to share in celebration; hell with a little help from your friends you can do most everything. What’s left?
Sex.
Yes, Sex.
That is the one thing that you don’t get from your friends. The one thing you don’t get is sex and everything that comes with it; be it kissing during the movie, holding hands as you walk, fucking and being fucked sideways, you name it. If it’s sexual you don’t get it from a normal friend.
I think I just made it pretty obvious what friends with benefits are. When two friends who are attracted to each other physically but not emotionally both satisfy the others urges. It can come in all degrees. It can be as extreme as full on fucking, all the way down to the innocent holding hands and a peck on the cheek from grade-schoolers.
The question I have to ask, is simple, is this right? Should it be morally ok for two people to perform these actions without loving, to some degree anyway, each other? Is it even right when two people are emotionally confused but want to feel good then?
I see two sides in this argument, although I am sure some of you will fall in the middle of them. The first side would be the self-considered righteous side, that people should keep these acts sacred and only perform them out of affection or love. The other side of course, would be that people can do whatever they want as long as they are fine with it.
Personally I don’t know where I stand. Having been on both sides of the argument at some point or another; It would make sense to me either way. What would I do if I found myself in this position is what I ask in order to find my answer. What would I do if I had a girl on me saying lets kiss, lets make out, lets hold each other, lets fuck, lets do whatever.
I’d do it. I cannot lie to myself that as a teenage guy if I was attracted to the girl, I would do it. Would I think it right after I did it? Well, here in lies what I am trying to get to. I suspect a fair amount of people would do it. I don’t think that this would stand at all on their morals or what they thought. In my mind for example, if I teenager said they wouldn’t do it if they found the other attractive, I think they’d be lying.
I would think that they want to look moral and better then the rest of us, or that they’d be too scared to do it but would want to do it more then anything, or that they’ve never experienced something like holding a person close and kissing them, they wouldn’t truly know what they were turning down.
I just don’t know if they would think it right. One other thing is honestly I don’t think someone can pass judgment until they’ve been in the position at one time or another and know what it feels like. Emotions are not something that can be based on logic, because they have a nasty habit of breaking out of logic.