FYI-On shaving, I don't know how sensitive your skin is, but, being a natural redhead, my skin is pathetically sensitive (Mrs. Xx2, by the way). I can't use creams or get waxed

, and even after years of shaving, I still get rashes, just not all the time. One thing I have found that one thing can stop rashes in their tracks-baby diaper rash cream. It is super sensitive, and it is usually unscented. A tiny bit will go a long way, just rub it in carefully. Mr. Xx2 has found this works for him, too, whether he shaves or uses a bikini cream. (I am so jealous he can use the cream-it is so much easier!

)
Another thing we use, especially before going out to play, is a honey-flavored/scented powder. I bought it at a fantasy party-it's called
Kama Sutra Honey Dust and it also keeps you dry, which is key to avoiding rashes.
Hope this helps! This was my first post, but I can totally understand your worries! No one wants to be all bumpy on a play day!

Mrs. Xx2