I've long been a lover of the male arse in all it's wonderful diversity and that includes a guys very sexy hole. What I've noted from porn and personal experience is the diversity of the male hole.
Some are more slit shaped looking akin to a female pussy. Often these have very horny lips which grow fatter as they are fucked.
Others are almost perfectly round and gape beautifully, often being able to see their insides. A perfect circle especially if it's had a bit if cock and its pulled out. Often the bottom is able to push out followed by a rosebud
