I hate to break it to folks but age of consent in the US is less than 18 years in all but 13 states. In the majority of states, the age of consent is 16. And that’s without parental authority, change that and it goes down to 13 years in a surprising number of states.
Yet still we don’t do songs about “my sexy teenage high school girlfriend” anymore, because most of us understand that the law hasn’t yet caught up with society.
I hate hate hate that song. It’s a popular square dance singing call, and I find the lyrics offensive enough that it detracts from my enjoying the dance.