Excellent question! I'm curious what other fans do, as well!Suggestions from us are t-shirts, socks, a towel!
Have fun!!
I was thinking some sort of tarp that surrounds you and you stand on, eliminating the need to aim. A large tarp that is disposable and environment friendly, so there's no need to risk cleaning it only partially. Does that kind of tarp exist?
I suppose a layer of newspaper or paper bags could acheive the same result? Newspaper could even fit in with the puppy play kink :)