Groan
A noted biologist, who had been studying little green frogs in a swamp, was stumped. The frog population, despite efforts at predator control, was declining at an alarming rate.
A chemist at a nearby college came up with a solution: The frogs, due to a chemical change in the swamp water, simply could not stay coupled long enough to reproduce successfully.
The chemist then brewed up a new adhesive to assist the frogs' togetherness, which included one part sodium.
It seems the little green frogs needed some monosodium glue to mate.