Offended about porn/boobs

So I found out my SO watches porn sometimes and I am totally okay with it but then I asked him about his preferances (hoping to improve our sex life) and he said it depends but there definately must be women with really LARGE boobs.. I am 32A. Like really small. He likes my booty tho. But now I feel like there is something he is truly missing..should I worry he could cheat in future or smth? I feel like I am not enough for him..how should I react?