Speaking of being rough, some guys like it when girls bite, scratch, spit on, smother, squash, slap and generally hurt them while getting off on them. Hurt him if he likes it. Similarly, many guys like to slap girls around, fuck them really really hard (abusively, almost), and cum on their face, etc... if you like being dominated and thoroughly ravaged in such ways, make sure you let him know, so he knows he can go all out with you; he may want to but may be worried that you're not into that. Not all guys are either dominant or submissive: the healthiest relationships are often when both partners like to play both roles and some in between. Variation is the key: communication is vital.