Watching Your Ps and Qs

In some countries you have to watch your Ps and Qs. In Mexico, however, when you take a bath or shower, better watch your Hs and Cs as well. An “H” on the faucet means Helado—cold. A “C” means caliente—hot. For the unsuspecting, the result can be a bit surprising.

Bits & Pieces, June 24, 1993, p. 3