When I had a flat on a worn tire last year - which made me realize how worn it was - my buddies said they weren't going to ride with me until I had a note from the bike shop that I had replaced it.
I reckon if you hang around *this* forum, you're gonna get ladies who want to have fun, not out macho each other with foolishness ;-) What are we, occasionally sensible???
I usually get 5000+ miles on my Continental 2000's - I'm trying to figure out some useful or decorative way to recycle them :-) Hmmm... maybe cut them and use them to guide track lighting?