I do find this whole genre a little odd, to be honest. I am in no way prudish, and am open-minded, but my personal reading tastes just don't go in this direction - I don't mean homosexuality, by the way, I mean explicit sex scenes in novels in general.
To be honest, even in "serious" novels they're not often done well. As to why I find it odd, though - well, from a personal point of view, if I want to be entertained and informed, I read a book. If I want to be titillated, I don't pick up a book...let's just say I'm more of a visual person!
In short, it'd take a bit more than a lengthy descritpion of Brett and Rock clambering from their weary appaloosas for a private hoedown (if you follow me) to get me worked up.
Sorry if this is too much info, by the way, I just find this whole subject amusing!
If this kind of thing is someone's cup of tea, though, please feel free to enjoy with my very best wishes and compliments of the season