A: Don't ask. I mean how would "Hey wanna have sex with me? " sound? Pretty lame, trust me. Just approach her and try to make her want you. If she refuses, she's not attracted to you. I love it when my boyfriend surprises me and just shows me who's the boss :P
A: You should be creative first- act out your fantasies! Let him take a break and show him what you want by doing it to him - but make sure it's pleasurable or else I don't think he'll ever try it. I'd try tying him up.