That was awesome! I loved the "Do you think I'm gay?"/"Cause I am!" bit. This whole thing was just beautifully animated. Even for a short gag, this was wonderfully done. I don't know if Mario actually punches Yoshi. Well, this Yoshi likes it.
I love seeing these different art styles. They even change in nearly the same shot. I never thought as this as sexual. People are turned on by anything of course. The voices were pretty funny too.