If your main intention is to mention how there's only a few gay ero games available, then let me tell you this:
Currently there are about 4 games in development that should come out around September. So keep looking out for those ^^
(Not telling what games I'm referring to though, find that out yourselves :P)
Reasons as to why there's so little:
Plenty, but I guess the most prolific one is the out of control sharing culture. Sharing always happens, that's inevitable. But try to keep it within reasons and control. Artists voice their disappointment all the time and lose their motivation to keep producing.