Sense Sonnet - Chiller

 Only Natural

Evolving of the humankind

Has not worked out as nature planned.

Not the good, nature had in mind,

It took a while to understand

That humans simply were not worth

All the troubles and ills they brought

Selfishly upon all the Earth.

So a remedy, nature sought.

Since human life depended on

Male sperm and female egg to mate.

One of the two would need be gone

Over time to seal human fate.

Nature chose to use spermicide,

Countdown to when last human died.