Since pheonix notes Nash, let's grin at what Nash notes of the phoenix. Though hardly fortunate appropriate for Father's Day.

Deep in the study
Of eugenics
We find that fabled
Foul, the pheonix.
The strangest bird
That ever was,
Rejecting any
Pa's and ma's,
It lays an egg
(Not ten or twelve)
And when it's done
Out pops itself.