"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).