I was working out in a unisex gym, just as I was just getting ready to change my wet shirt, from the running I had done, I heard two men moaning in the men's bathroom. I got curious and sneaked in to look.

My eyes went wide looking at two big muscular men rubbing their cocks together and kissing savagely. They were literaly devouring each other.

One guy moved back a little and bent over saying, "Fuck my ass, Donald! Fuck it hard!"

Looking at them made me feel hot and my hand started to move of its own accord, going down on my own pussy, and rubbing my wet dripping pussy.

The other man moved his cock without hesitation, and rammied it hard into the offered asshole. The one bent over  grunted, "Harder!"

Donald reached around and grabbed the other's cock from behind and grunted in turn, saying, "Your ass feels good, Mickey!"

I started laughing so hard  I fell on my ass.

Mickey and Donald were having a bi-fantasy.