I know a 21 year old girl dating a 44 year old guy, been tighter about 3 years. The reason according to her is because he’s mature, has his shit together, has a mortgage which they both pay into now, has a good job and looks after himself in the fact he keeps fit but the most important thing to her she says is that he’s funny and cares for her and loves her. I may not agree with the age gap but one thing I can agree on is that’s what any father wants for his daughter or son for the fact. Someone who loves them, respects them and cares for them.