Well seriously speaking apart from that joke, performing sex doggy style after a certain age can certainly have a telling effect, as I found out. I am in my mid fifties but both me and my wife have the same old flame for sex as it used to be years ago. That time we almost perfected each and every sex style or position, but that day we tried doggy and after a little while we both were dead, as I was in no position to beg, I became so fatigued after the initial few minutes!
