Good to hear some sense spoken here.
The way posters such as @anytipswelcome, @Marshmallow4545 and @weericky are saying a 16 year old having consensual sex with a 20something year old is paedophilia is both ridiculous and extraordinarily offensive, not to the couple, but to actual children who have been abused by paedophiles.
There is no way that a man having sex with a 9, 10, 12 year old is remotely like a man having consensual sex with a 16 year old, and it is disgusting and wrong to suggest that it is. That is why the age of consent is 16 in this country, not 12 or 13 as it is is some countries. In several civilised European countries it's actually 15.
I have known lots of 16 year olds, girls and boys, yet have never known a 16 year old girl who hasn't gone through puberty and physically still looks like a child, yet I have known plenty of 16 year old boys who do. It is very unusual for a 16 year old girl not to have gone through puberty and in fact it's recommended if a girl hasn't started breast development by 13 or periods by 15 that medical advice should be sought.
So men who are attracted to 16 year olds are attracted to someone with an adult female body, not a prepubescent one, which means they are not paedophiles. However much some posters like to call such men paedophiles they are utterly wrong. People may think it's unsavoury, but in no way is it paedophilia and you diminish the experiences of victims of paedophiles by conflating a 16 year old's consensual sexual experiences with the rape of an actual child.