Not for me, but I have had past boyfriends and my current one say that B hurt and were too small. Basically pointless and they didn't see the point of it until they tried bigger. C is decent depending on the size of the guy but D, DD are best for an all encompassing titty fuck according to experience and what I've heard guys say.

B cups probably won't work well for that. For best chances, try to let gravity help you - find positions where your chest is towards the ground (awkward, but gravity will help give you "bigger" breasts). A lot of people attempt breast sex while the female is on the back, and with a B chest, that doesn't leave much to work with.

try leaning over it makes your boobs come down more so deres more to play with

My wife is something like a G There's obviously plenty there for tit fucking - but we don't do it all that much. In my old age, I need more friction. You could say that's why anal sex has taken on a whole new level of interest for both of us!

She loves it when I cum on her tits when I'm riding her big dick!

BTW - I'd cum on her face if it guaranteed a good red-ass workout with what you're holding behind your back!