I first posted this as a response to my original posting. I am the 20 year old coed with
a B/F who are now mini-kinkers.

Thanks for the comments, guys. My B/F has taken to this activity like
a fish to water (pun intended). The couple now call him, "hydrant-man" and we
laugh, wondering if Marvel Comics might be interested in featuring
him in a strip. His pecker is not really long but thick and he holds it
and sprays the couple in their tub. They love it when he does their
faces. I'm learning how to aim better. We did turn down a second
couple introduced to us by our host couple. We don't want to lose
our amateur standing. We still baby sit for
them, fuck a lot, then pee on the parents when they come home.
It's an interesting routine and I have learned a lot watching them fuck before
we water them down.