Temp?
Was always a subscriber to the Scot kilt deal, being one.
So two fine young men now that are 50 years old, and both came about before I got into prolonged gee stuff. Was flying Deuces and VooDoos then. Even the later mudbeating tours were not that bad until getting to the Viper or my last 4 years. Whew!! 3 or 4 minutes pulling 4 or 5 gees about the same time. Then the harsh breaks with 8 or 9 gees for maybe ten seconds.
My vote for offspring is "technique"! Heh heh.
As far as longevity, my squad from USFA had 15 grads, and 11 got pilot assignments. Out of that, we had 8 make it to fighters or attacks jets, tho some had to go thru something else on the way. One had to become a Navy RIO.
We lost two of our pilots in 'nam, and two since then for medical reasons not involving the heart or being fat or..... So we are now here with 6 fighter pilots and another 4 pilots that flew heavies or helos. I would say we had pretty good genes and no small amount of aviating skill.
Gums sends..