Lewdzone seems to have a lot of good stuff. I tried Man's Best Friend. You get to role-play a dog seducing (and maybe impregnating) the family and neighbors. There aren't too many decision points, but there are lots of plotlines. Anyway, the protagonist is certainly a lustful horn-dog, but he's also a big sweetheart. In that way, it's a reminder (as if I needed one) of what awesome fluffy friends they are. It makes be feel a bit bad for objectifying these wonderful pets, but I suppose everyone around here has made peace with that.