THIS IS THE MOST IMPORTANT THING I HAVE EVER READ
Silverfish have an elaborate courtship ritual to ensure exchange of sperm. The male spins a silken thread between the substrate and a vertical object. He deposits a sperm packet (
spermatophore) beneath this thread and then coaxes a female to walk under the thread.
so imagine this. A guy, fills a balloon with semen, hangs it over a tree from a rope. and waits for a girl to walk along.