I have two replies to this one.  I use them interchangeably.

1)       Funny, I’ve been doing it this way (i.e. the correct way) for years and I know I never will have a problem (also a good line for seat belts!)

2)       It only takes one tragedy.

And regarding other “excuses”

Goggles:  “they’re uncomfortable”    so is blindness

               “I look ridiculous”     you look more ridiculous with bandages over your eyes

Closed toed shoes:  “my feet get hot”     oh, is a cast cooler?

Food/drink/gum:   actually, no witty comeback.  “put that away and don’t be an idiot!”

Any of the above:  “I’ll be careful!”      the fact that you’re engaging in unsafe practices contradicts that statement.