20 year old to date a 17 year old weird or normal?

I always never know what the age limit should be because everyone is legal but it still seems weird. I’m always approached by 20/21 year old men and although it’s not that weird for me i don’t get why they’d wanna be with a 17 year old lmao? i would never go that young if i was a guy. tbf to them they always say i look 19/20 but even when i tell them my actual age it doesn’t stop them talking to me so they can’t blame it on me looking older idek is it weird or normal?