My boyfriend and I have been together for about 8 years.  My problem is that he wants me to talk dirty during sex, but it's just funny to me.  He might say "tell me what you want me to do or how you like it" over and over again and I just want him to shut up because it ruins the moment for me.  It's just too much to concentrate on, but I feel like I should compromise. Any advice?

I think he wants you to whisper "f*ck me...f*ck my little pussy" softly in his ear.

So,  talk dirty to him!!!
 
Have you got a problem with saying such things as "Do you like the way I suck your cock? 
 
or Slow down, I enjoy your fucking, and want to feel the entire experience!!  etc....

   Sex can be as intimate or as funny as you want it to be and it does not have to always be oh fuck me, deeper harder oh baby make me a woman, talk. Whispering adoring remarks about how beautiful she is and how good it feels inside her or how you love to kiss her soft lips will go a long way for most women.
   If you want to get a giggle out of her you can try something off the wall. One time my husband was fucking me really slowly and gently and telling me how beautiful I was.  I was getting into the whole thought of it when he started to kiss my neck and he whispered into my ear, "Please don't let me forget to get the car serviced this weekend."  It surprised me at first but then we both started cracking up.  He kept thrusting and the adrenaline shot of it all really helped him last a lot longer than usual.  We whispered giggles back and forth and we did it in the missionary position for 55 minutes. I got off several times.  As he began feeling his orgasm approaching I squeezed down hard on his penis and bucked my hips upward into his pelvis as I surprised him with tickling under his arm pits which are extremely sensitive and is usually good for an elbow if someone tries it.  He said that surprise made his actual ejaculatory orgasm last until I stopped.  I'd say at least 30 seconds.  He was spent and very sensitive but he said it was the best orgasm he had ever experienced.  So don't be so serious about things!!

maybe he is not meaning to have a dirty talk exactly but needs you to say exaclt what u feel and what u want , it is really very nice when u clarify what u realy need try to keep ur sexual relation open without any embaressmnet if u feel that u need him to go deeper tell him if u need hin go slower or faster u have to say try to express all ur sexual feeling in talk u will find it pleasure

My lover and I don't talk "porn movie talk," because if you see two or three, it just seems to do much for us. 

I actually will casually talk softly, kind of around the topic of sex, at first, the whole time very gently rubbing every place on her body except her nipples and clit.

This usually starts getting her super hot.  Sometimes we tell fantasies to each other... usually her more than me... and in fantasies there're no holds barred... it might be another guy or two with us to please her and what they'd do.

Maybe we're in a group---stripping down, and dancing around a fire and breaking off to share other partners for a while, and then rejoining the group...

Maybe it's two or three girls all joining her on me...

Maybe we're married, co-teaching in a college sex class, and we have to do hands on demonstrations to the students...

At some point in the fantasy, my babe is about to explode, and then I start, ever so gently, just touching her clit and nips.   She generally doesn't last too long after this....

I know this approach may not be for everyone, but it works for us.  Usually I'll start the story and take it until she giggles and says that it's starting to sound like a porn flick... at which point she'll pick it up and I'll occasionally interject.

I can't believe what I confessed when my husband and I talked dirty while having sex.  It came out that I was having sex(mosly bj's) with my hairdresser.  It just came out!  At the end of my in detail bj of him I let my husband know this really did take place!  My hairdreser is around 50 and I'm 34.  My husband has me getting my hair done every two weeks.  I come home with more real true dirty talk..