My Athlete's foot is beginning to impede my walking severely
I'm taking steps to fix it
What do you call a fart in a well ventilated room?
Doctor, does being obese impede my chances off a normal sex life?
No, but it does add weight to the problem.
Why did sexual frustration impede the development of mathematics in Ancient Greece?
Because mathematicians in Ancient Greece couldn't get no irrational fraction . . .