How difficult (for a guy)?
easy, (depending on the bib model), pull down the front of the bib (do not remove shoulder straps) and take care of business
I use castelli
.
Easy weezy (pardon the pun).
Like Tingley said, pull 'em down, whip it out, and wee wee wee all the way home.
You can also snake it out one of the leg openings by bunching up part of the leg portion. Makes tucking things back in a little more difficult though. It’s just another technique in case the chest/suspender portion is higher and you can’t just tug the front down.
-Darrell