If anything, your hands are dirtier than your junk. Your junk sits behind clothing. Your hands are out touching things all the time.

Wash your hands before touching your dick. 😌

But also: If you touch anything to flush the toilet, you should wash 'em again after.

Imagine going to shake hands with someone and they drag their hand through their moist armpit first. Would you want to shake that hand?

No?

Then why would you want to shake their hand if it’s been in their sweaty junk pile? Backspatter of piss aside.