What I think men enjoy about such bathroom opportunities is that we know everyone does it, many try to hide they do it, there is a huge outcome (odor and size) for such little effort, you feel somehow happy and energized afterward (and you didn’t feel “bad,” before), it’s free, you get to guess at what food item made it smell “different,” etc.
In sum, it’s a massive equation with all sorts of ingredients of life and engineering, wrapped up in a fart, presented with pants around your ankles and an open, normally, very private, orifice aiming down at water that is getting dirtier by the minute that leaves you wondering how to mitigate the next smelly launch’s cold water splash back up on you.
In other words, it’s not too unlike the complete puzzle women provide, to men.
I’ll give you points for very good writing :-)