“Rectum? Darn near killed 'em!”
Though 'Rectum' and 'Erection' are two completely different things, they have been known, particularly by the Greeks, to fit together like hand in glove.
Also not to be confused with a plectrum. It can only end in tears. Trust me on this.
Don't even think about confusing it with your philtrum.
You may also have been looking for Welsh town 'Wrexham'. If so, you are probably on the right page.