-To have a one pump sexual intercourse, but after that ppump, you ejaculate.
-To pump one time during sex to then be finished, done, or to have ejaculated.
-To not think a girl is good in bed, so you pump in once, then to just say you're done.
-To have sexual intercourse with a female that isn't good looking, so you stick it in, to quickly pull it out and say that you have ejaculated.