My Little Pony: Friendship is Magic - Image #227,025

Point 1: It's the internet.
Point 2: Bronies are largely heterosexual males.
Point 3: It's cute/funny depending on the situation.
Point 4: Very low population of male characters (<--- Most important)

It's got nothing to do with a particular love of lesbianism. It's much simpler than that.
This fandom ships everything. EVERYTHING.

I rest my case.