I've actually heard that the transition from one's lover to the mother of one's children can be extremely hard on some men, though I've only really heard of it happening when the woman is pregnant or after the baby is born. Are you pregnant or having you been talking about it a lot lately? I also like unhappyguy's use of the word "lovemaking" instead of sex or f---ing, etc. Maybe try to make it more romantic and then go back to the wild and crazy things a little later. I also agree with try initating a little bit more (if you aren't already). The only other thing I can think of is perhaps a sex therapist because I'm sure this wouldn't be anything new for them.

And one more side note? As the one with the higher sex drive in my relationship and also working three jobs -- sex is totally not a priority right now. The number of times I've turned my poor fiance down recently (though, he never asks directly).... I'm honestly probably borderline being cruel, because I'm always asking for massages (retail is a killer...) and then curling up in a ball and going to sleep, but I simply don't have the energy, or quite frankly, the time, a lot of nights. Just some things to keep in mind, though, that it could simply be he's exhausted and doesn't want much more than to eat and sleep when he's not at work.