I used to give my dad a lot of crap, calling him 'the old man', etc. One day he went off on me. "Just remember", he said," you're 20 yrs old and I'm 50 and I can say I changed your diapers".
"When you're 30 and I'm 60 I can still say I changed your diapers"
"When you're 40! and I'm 70! I can still say I changed your diapers."
W/o hesitating, I replied "Yeah dad but when I'm 40 and you're 70 I'll be changing YOUR diapers"
I miss my dad.