Not quite warm enough

Help! Hubby and I are trying for another baby and the thing is... We both WANT to have sex but I want more rough and passionate and he wants more "highschool" type stuff. (You know what I mean. Endless, bunny sex. The raunchy kinda stuff.) Don't get me wrong, he's more than impressive. That's not the problem. The problem is getting in the mood. Mentally, I'm all for it. But physically I can't make myself excited. How do I get him to take some initiative and help me out? Anyone else have this problem? Maybe there's something I could do?