Yes, yes, we all know Girl-On-Girl Is Hot. But what some authors are only just beginning to realize is that, for certain women (and of course, certain guys) Guy-On-Guy Is Hot. While not a ubiquitous cultural assumption in Real Life the way its Sister Trope is, it is nevertheless an existing mentality. It's the reason for Yaoi, and the times when Ho Yay is played intentionally for Fetish Fuel. Some authors adhere to this, or at least acknowledge its existence, and thus we get scenes of half-naked men wrestling in either mud or jello. Examples of Guy-On-Guy Is Hot include: