What's your favorite thing to use for a quick mess that's easy to clean up?
Personally I've found that either vanilla cake mix or vanilla pudding mix with water and a little bit of food coloring does the trick. Curious what everyone else on here uses! Lmk
I don't get messy much anymore, in large part because solo sessions just don't "do it" for me, but when I did, I had a fondness for syrups (especially pancake syrup and both light and dark corn syrup).
They're basically just viscous sugar mixtures, so they rinsed/washed off really easily with a warm/hot shower, and they also offered a nice, (very) sticky experience (that was also surprisingly good as lubricant for certain other solo activities).
The new Avalanche foam spray from Messy Supplies is amazing. Really thick and creamy foam spray that's very easy to clean up afterwards. It's my wife's new favourite messy substance.