Most male marsupials, except for macropods and marsupial moles, have a bifurcated penis, separated into two columns, so that the penis has two ends corresponding to the females' two vaginas.
Then that triggered something I haven't thought about in decades...
Mis-spent youth ping
Double your pleasure!
Double your fun!
Take two girls to bed, instead of one.
** just make sure their daddies don’t have guns!