He wasn’t old. It started on TNG when Guinan told him to try it, and he immediately dubbed it “a warrior’s drink.” I wasn’t sure if it was about defecation, or that a fruit juice might be a child’s drink as opposed to blood-wine or something else more manly.
There was a news item a while back when a woman watching Nick at Nite called to complain because there was a scene in which one of John Ritter’s testicles briefly fell out of his shorts on “Three’s Company.”
Snopes isn’t sure about that, even with vidcaps.