Next time that you feel romantic,
remember to switch on the gene
that helps you make the moves that, antic,
tell your mate you’re feeling keen.
Whether single or espoused,
grounded well or drifting rootless,
let your circuits be aroused
by the gene fruitflies call fruitless.
All who lack this master switch
and are fruit flies surely die,
but a human with an itch
only needs it if a guy,
since if you’re a gal you can
survive by faking it whenever
playing with an itchy man,
provided you’ve the gene called clever.