Yeah I myself would be a little insulted

In my opinion, you might be reading too much into this. The guy probably had a good time, he was showing some appreciation, that or he REALLY needed it. ; )

Well he could have said hit the road b!tch. Would you have preferred that?

maybe it had been awhile since he had any and just needed a release and you gave it to him and he simply meant thank you.

Some guys consider the giving of sexual favours to be, well, "a favour," but mostly, when a guy thanks you, it is just because he is so much at a loss for the "right" words to utter, that he doesn't really know what else to say, so "Thanks" is blurted out, as an afterthought. What would you have wanted him to say? Would "That was fantastic!" have been OK? How about, "I've never been with any woman, who has made me feel better, than you have." The point is, a man will usually compliment a woman on her performance between the sheets, especially if he wants to be invited back for another adventure with her. But as I said, many guys just don't know what to say, and nervously utter the first words that pop into their minds, particularly after the first time with a particular woman. As he gets to know you better (and you get to know him equally as well) words may not even be necessary between the two of you, and instead of talking afterwards, the two of you will just bask in the afterglow, with a lot of warm, naked cuddling. Really good sex doesn't need "dialogue," per se; moaning and heavy breathing are sufficient to let your partner know that s/he is pleasing you, or has pleased you. +5

Jus a guy?..... BF?... I will feel insulted. IF he's my husband I'll understand. I know him so well.

I wouldnt say that myself. Its kinda rude.

A girl once said it to me (after a one-night stand), and I said it back to her. I didn't think anything of it until now. But yeah, the pleasure was mutual, so what's the reason for saying Thank You? I don't know. Just being polite, I guess. After all, what SHOULD two total strangers who've just met and will probably never see each other again say after having sex?

It could be simple politeness. Maybe his self esteem is so low that he thought you were doing him a favor. Take it as the compliment it was meant to be. +5

I've said it myself. Nothing wrong with good manners.

I'd say that depends on the circumstances. I've never been with anyone but my husband. In our case, good sex with a spouse is always self-sacrificial. If each of you is doing your best to see that your spouse enjoys himself/herself, then you are both going to be putting a bit of effort into it. A thank you at the end just acknowledges that effort. Now, if it is just a one-night stand, it might just be thanking you for the use of your body.

I don't understand people who say this is wrong or that they're insulted by it. Take it for the compliment that it is. He was probably trying to express his enjoyment, but he got a little awkward.

I think that I would rather hear "Your Awesome" or "OMG, that was fantastic" +4

I don't know that it is rude or "wrong", but as we see from many of the pevious answers, it is open to rather a lot of different intrepretations, so maybe for that reason if no other it would be good if we could use another phrase...

I would think it rude to say that, you should have said "for the sex or the std's?"

Better having him say thanks, than saying you were no good.

i've said it.it never was met with any grief.i meant as in "thank you,i neded that".which i did.

Since he was just "a guy", he merely thanked you for providing him a hole to masturbate in. You probably enjoyed that moment too. So ignore his remark.

It is not unusual for a guy to say that if your relationship with him is just based on sex...Saying thanks is unnecessary if you love each other. +5

i always say thank you to my boyfriend after sex. men are egotistical creatures and need it to be stroked. they need to know theyve done a good job being a man or they might go soft on you (litterally :D) but it doesnt mean you have to tell him hes the best all the time only when hes trying to please you (which during sex he should be.) men are more sensitive then they seem and take blows to the ego very seriously especially from a women they love. i remember i once told my boyfriend that i wanted to masterbate myself because his hands were too rough and it hurt, he thought i meant he was just bad at it and was very deflated. i made sure he knew how much of a man he is next time. gotta keep that fire roaring. no need for him to say it to me, i know how good i am when he blows, but he says it anyways and its nice to hear.