Fart Humper, what the hell are you doing in your new avatar? Those look like actual lumps in the seat of your shorts...
Wait...there's actually a small woodland creature called a fart? I thought fart humper was a term for a man that like other men.
Minnie, you are one for picking on the finest detail of what people say... I still have never seen a fart.. Its the farting equivelent to "She has a bulge under her jumper, she MUST be female"
Without going into gross detail, farts are not infrequently visible, if only by the evidence they leave "behind" them.