Oh guys! I realize it might seem like stating the obvious but it’s because Mac is gay. But maybe he’s not. I think the point was to drive home that Mac is very confused sexually. He doesn’t seem to be attracted to men particularly, but has weird little homosexual-like quirks that aren’t really explained very well. It’s almost like he does it for some kind of power thing. They have dropped a few hints prior to that episode, but this is the one where they sort of really spelled it out.
Remember the gas episode where he uses a graphic description and weird hand motions “**** them up the ass! not gay sex.” He’s constantly betraying his weird sexuality. But he also seems to be attracted to women too. Another example is the one where they have the dance marathon. He has a dance-off with Dennis and towards the end of his dance he’s on his knees in front of Dennis’ crotch bobbing his head. It’s strange. Oh there’s also the time he was dating a transexual.
My friend and I have sort of guessed that it’s more of a power thing to him…somehow. But they are making the point that despite his super macho tendencies, he seems like he might be gay, so it’s hard to say.
They were ostensibly dressing up to break in, but really Mac wanted the waitress to be “behind him” etc.
Also, Danny Devito can be a bit of a drag sometimes, but the truth is that he does also deliver some of the best lines of the show.