how old is too old

I just turned 38 and although I don't think my sex life will end soon, How old is too old to service black cock. Can you picture yourself on your knees at 70 sucking off a 30 year old black stud? and guys whats the oldest white slut you have fucked. Did you like it?
My wife turn 70 and she fucks like any young lady and what is more Blackmen love to fuck her