I’d come across the phrase “the infamous Prince Albert in a can” while reading a history of tins and canning. Not knowing why it was infamous, about 10 minutes of Googling later, I found this article. So, apparently “Do you have Prince Albert in a can?” is a snicker-inducing question from the early part of the 20th century. Oh, and the appropriate retort to a reply of “Yes” is, “Well, you’d better let him out, then.”
EDIT: added image. Of course, a “Prince Albert” is also a type of piercing.
EDIT: another image.
Listening to Klezmer Tunes from the album “Kalman Balogh & the Gypsy Cimbalom” by Kalman Balogh