I am not into content that is male on male, but I have to say I am not an asshole. I do see the comedic value here as well as the fact that it's not sexual to an extent of being off-putting to a person who would rather not just see straight up male on male action. It's funny. It's something I've done to girl's food in the past. I kind of have to laugh at it. The fact that it was done in front of two guys is not really as on the nose as full on gay sex because it's a pizza and you can kind of substitute the pizza with a girl and bystanders become irrelevant.
The only real criticism is that the pizza looks horrible. That is not a realistic looking pizza at all and it's got a misshapen figure, kind of like a lunchables pizza.
I do find it odd they didn't even tip the waiter.