I've seen guys who put lotion on after every shower/pool/whatever experience that would dry out their skin when they were cleaning up and getting dressed afterward.
Sometimes it's before the underwear goes on, sometimes it's after. And no, other than the casual 'wipe' across the genitals they weren't applying lotion there. mostly to legs and arms. it was no big deal to them, apparently.
to me, though. i remember the first couple times i saw it being taken aback a little, since lotion had only ever been for jacking off at that point in my life.
as i get older and my skin is not so oily, i understand why they were doing it.
but it still seems "slightly" exhibitionistic?