yeah, too, he almost always puts in more physical effort then me to have sex (our favorite position is him on top, so, he does most of the work). when he's tired or whatever i think he just really doesn't have the energy to please me and he doesn't want to do a half assed job.

but "Also for me, I think my reaction was partially based on a misconception that men always want sex and for him to turn me down means that there must be something wrong with me" is pretty much exactly on point