Don't know about my family.
But one of my closest friends (which is now my best friend) is almost as big as me. And we found out that we were both on the big size at least 4 years after we met. We were at a college party, he started dating a girl and they were both there. He told me he was really into her (they got married!) and that it was about the time to have sex. I was drinking with other friends and he asked me to have a talk in private.
I'll never forget what we said.
- Sorry to bother you, you know I'm here with Sara, right?
- Yes, and that you both want to have sex tonight so you're leaving, no problem, just go and have fun!
- Thanks but not only that... do you have a condom?
- Well... yes I can give it to you, sure, but... they... are... for... my size, if you know what I mean.
- Oh damn it, I know you're big. I'm big too. This is why I'm asking you.
We both laughed, and I gave him a pair of my condoms (FYI: MySize 64).
And what I loved the most about this is that after that night we created our code: every time we need to talk each other about sex, big dicks problems, girls, and stuff like that, we ask: "Do you have a pair of gloves?" Glove, in Italian "guanto", is another way, in Italian, to refer to condom. So, for other people is just a normal question, but we know that if one asks this question to the other it means that he needs to talk urgently about sex.