rebdoniel- Compounding the problem is the fact that frum society will call a bachelor with a career and his own home a “boy” even if he’s in his thirties.
Everywhere, the 30 yr. old unmarried guy is called a ‘boy’ and it is not exclusive to our community, and I don’t understand what would be wrong with that. But we call an unmarried man of any age a ‘buchor’ in an extremely positive sense. Since although he is unmarried, he still retains his individuality and responsibility on a personal level, without having to adhere to anything besides torah and mitzvos, that’s why we call him ‘chosen’, just like a budding 13 yr. old.