Decades ago when I was young me and a female friend were joking with another colleague about how old he was. When he mentioned he had a horse when he was young, my friend said “what was it, an eohippus?”. Young and nerdy, we thought that was hilarious. Still makes me giggle.
A high school friend’s older brother was catching some flak from their dad because his chemistry grades weren’t the best. His dad said “I always got As in chemistry.” The retort was “Yeah, but back then there were only four elements.”