What do guys think about girls who are good in bed?

I've been in a friends with benefits thing with a guy for a bit over a year now, the sex is great and we always have a great time. After or during the amazing sex, he always compliments me saying he really enjoys his time with me. I'm worried that he think I've been "around the block" a few too many times, not that I should care or anything but the last time we were talking I might have said something by mistake that could make him think of me in this way. Im a bit younger than him and I just dont want him to get the wrong idea about me - mostly because I dont want him to get grossed out and I lose the best freaking sex Ive ever had in my young life hahaha! What do you guys think?