When I was in training in the Army there were two girls in there with me, both with the last name “Pool.” In the military, everyone calls one another by last name — at least before you have a nickname.
Well, the thing was, one of the Pools was very tall and one was very short. So I could distinguish them when referring to them, I started calling the short Pool “Wading Pool” and the other one “Swimming Pool.” Then everyone else did too.
Neither Pool liked this, but it stuck throughout training.
No, I was not a favorite of the Pools. I think Swimming Pool still liked me though, despite herself.