I'll be honest with you. What you describe sounds very similar to what my niece has recently described to me about her boyfriend, and I will say the following:

* It almost sounds like your boyfriend has some sort of hypersexual, over the top sexual drive.

* You should NEVER have sex with him when you are not in the mood. Sure one would hope that at least sometimes you are willing to have sex, but you should NOT feel like you are expected, like a piece of meat, to be there whenever he feels like it.

* Your boyfriend needs to respect when you don't feel like it (especially if you do it a bit), and seriously he should not be mega pressuring you just cause he is a sex manic (he almost sounds like one).

* I am a male, and sure I have hormones, but seriously I have a low view on guys which are so constantly in need of sex that they extremely pressure their partners to always satisfy them. Tell him to go look at porn and jack off, if you are not always in the mood. If he forces himself upon you when you have made it clear your not in the mood, well that is going into "rape" territory.

You are not just a sex object. You were not born to satisfy males sexual urges. You should ONLY be having sex when you BOTH are in the mood, and serious if your boyfriend can't handle that then TOUGH LUCK.