When I took a course in American Sign Language several years back, the teacher (who was deaf) enlivened the proceedings with many jokes and funny stories. To this day, I don't remember them in words but in memories of her signing and pantomiming. Writing them down is necessarily inaccurate, but here's one I was reminded of by Jordan's German experiences: An American deaf person meets two German deaf persons, and the latter two aren't too friendly. The American asks why, and the first German indicates that he became deaf due to American bombing during the war. The second German indicates the same. The Germans then ask the American how he became deaf. The American answers, "German measles."
(From the "Rest" of RHF)