I remember having to drag my two preteen sons into the shower. Now that they are grown you can’t get them out of it. They both take long showers.
They found out about women. Have 4 sons. Pre teen/early teen years it was a battle to get all but the oldest to shower (Oldest was always a neatnick) Once they realized that girls might be fun to hang around with, they showered daily without a peep out of me.
I do have a theory that the only reason men shower is because of the chance of spending time with a woman. Otherwise, maybe once a week for the guys.