I get a similar situation almost everytime I eat with my family. My dad's side of the family has a long history of male baldness that sets in at ~25 years of age. I'm now in my late 20s and I was no exception to this, but I have done something about it with toplace.. But when the topic of baldness comes up at the family dinner table, as it often does, it almost always ends up with a joke about how I should be "careful" since I am at the age of onset (as if being careful helps). It makes me feel terribly awkward, and reminds me of how cruel it is to make jokes or laugh at people who are bald / balding. I don't think I owe it to anyone to tell them about what I've done. The only one who knows is my girlfriend at this time, and she's the only one I plan to ever let know..