Uhm...what are you even talking about? Right now, just on the first page of 1x1 alone, just going by titles, there are already 3 threads looking for MxM, two of them seemingly exclusively MxM.
Yeah. 1x1 search threads with MxM may not be the majority (that title goes to MxF with the person that made the thread wanting to play the girl), but they certainly are so abundant it's not even funny. Now, maybe the ones that are MxM may not necessarily appeal to you for other reasons, but there's certainly no lack of it.