..Bodily functions are a reality of life, and anyone who gets offended by them needs to get out of that pristine fantasy world they're living in and remember that there is nothing dirty or disgusting about the proper function of the kidneys.
I feel the same way. If you need to pee, just dont make a big deal out of it, just go. Easy to do in warm water but significantly more trouble in cold water. My wife, now in her new Fusion drysuit makes a point to go before a dive. Shes not a big fan of the She-P program - yet.
When I dive in my drysuit, I also go just before I dive and have no trouble waiting until I surface. Its on smaller boats without heads where guys do have a distinct advantage and generally no problem going to the rail or performing a quick prop check.
Reminds me of the story where a little girl watching a little boy peeing next to a tree says, My, thats a handy thing to have at a picnic!
The problem is worse on small boats in cold water, diving in a drysuit. Women just need to let me know they need some private time and Ill be happy to turn my back while you do your business. There will be no snickering or wise cracks from me. Id much rather they go than to be uncomfortable for the rest of the trip.
BTW, Im not a fan of a wetsuit diver coming up and letting urine drip out of their suit. Just like you momma told you, flush the damn toilet!.