I've noticed a theme in sitcoms, more from the 80s/90s than now, that a bottle of hand lotion would be used a sign that a character has been masturbating.
I don't get it. I imagine that lotion might look a bit like semen but I would think that PVC glue would be a better analogue.
How has a lotion (of all things) become a metaphor for masturbating? Why not (say) deodorant?