Jabberwocky
Frumious Bandersnatch
I also look after a mates junk for him and use the same method and no problems.
However from that experience I learnt that our respective pubes are quite different. The hair on his nuts is really fine whereas mine are quite course but the opposite applies at the base of our shafts and surrounds.
The definition of 21st century mateship right there. Wish I had mates that good.