It's not weird. If it were weird - even if every other person in the world with this condition decided they wanted to dash outside and do a musical number about it - it would still be your right to keep such private information, private.
Two ways of looking at this come to mind. One, it's a medical condition.
Folks with diabetes generally don't introduce themselves to everyone with, "Hi, I'm ____, I have diabetes!"
Two, it's regarding sex organs.
People don't usually introduce themselves with statements such as, "Hello, my name's ____ and one of my testicles is bigger than the other!"
Heck, combine the two. Medical condition affecting sexual organs. Outside of advertisements, people don't go around saying, "Hi, I have genital herpes."
It is sometimes relevant (not always) in a doctor's office, and it's relevant if someone may be interacting with your genitals. Otherwise it is not relevant and nobody's business.