A man had to go to the hospital to have his wedding ring cut off of his penis. (It happens.) His mistress had found the ring in his pants pocket while he was asleep, and got so mad at him that she stuck it onto him.
Which is worse?
Having your mistress find out that you're married (and commit revenge in this way).
Explaining to your wife, and the ER staff, how your wedding ring got onto your penis.
Finding out that your penis fits through your wedding ring.
(I haven't done a poll in a while, so…)