"
Spectacles,
Testicles,
Wallet, and
Watch" is a
mnemomic for how to properly make the
Catholic sign of the cross. It was taught to
Eric Idle by
Robbie Coltrane when they were hiding in a convent in
drag in the film
Nuns on the Run.
It only works if you have your wallet on the left and wear your watch on the right. (Most likely if it's a pocketwatch).