I’ve never had ‘monkey butt’ diving....I can only assume it’s because I wear Lycra saxxx shorts under my wetsuit. I’m guessing you need something that is very tight fitting.
you will need to stow your modesty...but honestly, no one could give a hoot on a liveaboard. It’s basically like being in the army/boarding school/sharing a bathroom with a sibling..
Uh . . .perspective is everything.
I don't know that lob experience is quite that for me but often we are too busy on the dive deck to notice what others are up to but if everyone starts to wear their lingerie, who knows.