Is it true if you dont use it, you loose it?

Yep.Is it true if you dont use it, you loose it?
if u r talking in reference to human evolution, u r right on target.....there r plenty of examples where we hv lost the functionality of some parts or organs of our body bcoz they became redundant over the years as they weren't put to any use......Is it true if you dont use it, you loose it?
it??? what is this ';it';????
yep, use it or lose it
well i know a 24 year old virgin who would be scared shittless if he heard that saying lol

red hair