But what about young men? Or young women? Or grown women?

While I don't necessarily agree with pekk that saying "30s and 40s" is ageism or discriminatory at all, saying "[people] are never offended at stuff like this" is exactly the problem the tech community is trying to solve with being more inclusionary of other people and cultures. Yes, people do get offended at offensive remarks. No, not everyone sees them a joke.