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never use a condom more than once 

Excellent advice that is totally obvious. The advice is a complete understatement.
Father: "When you go skydiving, don't forget to use your parachute."

Teen son: "Thanks dad...and remember to never use a condom more than once."

as much use as a hedgehog in a condom factory 

Useless at best, causing severe damage at worst. Similar to saying, "As much use as a bull in a china shop."
Guy 1: Damn it... My sister ruined my school project again.

Guy 2: Wow. She's as much use as a hedgehog in a condom factory.