It's not illegal, and I ususlly date people of my own age. My latest ex was 32.
A 30 year old having sex with a fifteen year old would be illegal where I live, though.
If you lived in Yemen and you were married to and having sex with a nine year old, I would be shocked too, even though apparently that is legal there.
I think most people in Sweden think it's inapropriate too, even if it's legal, but she likes me and I'm really nice to her. And she
is very mature. She even helps teaching a disabled boy in her school, so she
is really intelligent, so it's not like I've seduced her or anything. She knows perfectly well what she's doing.