An awful debility,
a lessened utility,
a loss of mobility
is a strong possibility.
In all probability,
I'll lose my virility,
and your fertility,
and desireability.
And this liability
of total sterility
will lead to hostility
and a sense of futility.
So let's act with a agility
while we still have fertility
for we'll soon reach senility,
and lose the ability....

bridge from Tom Lehrer's When You Are Old and Gray. Just wanted to see if I could still do if from memory.

Peter.