It would be really good if people could be mindful of the impact of saying things like, 'I think it’s really odd and also unattractive. Can you imagine going on a date with a 27yo man who lived with his parents? No thanks,' or 'I think it's odd and lacking in independence'.
It's so easy to make those kind of judgements. I can't say I'd want to date a man still living at home, to be honest. But equally I'm 40 and I know several adults who still live with their parents (male and female) and in every case there's either significant physical or mental health issues which have led to that situation and some of those issues are invisible. My parents have friends whose son just died 2 weeks ago (in his 40s) having lived with them for a good 15 years. He was an alcoholic and just couldn't get on top of his problems. Another two men I know who have never moved out have M.E and PTSD. They've both just turned 40 - and I know both are deeply ashamed of not having managed to stand on their own two feet but they wouldn't voice what they've been through to many people because they know full well people think they're deeply inadequate. They're both gentle, kind people who struggle.
Not everyone who still lives with their parents will be there because of having problems, I realise, but let's not stigmatise and sneer at people anyway. Life can be really hard and not everyone copes with adjusting to adult life in reality. They just don't.