Mmmm, K?

I listen to a lot of songs, as you know. I listen to a lot of words, lyrics. But this one, it has me stymied. My usual KOBC was playing old ladyish Christmas music that I didn't like, Air One was talking about the indide of their refrigerator at work (wow, breaking news!) and Magic 93.9 was playing commercials so I turned it to my other alternative, KOOL 106.1. Oldies. They played this stupid version of 12 Days of Christmas that I endured, then I listened to the Tulsa news and weather. Then they played "Brand New Key" by Melanie. Slightly catchy tune, the way she goes way up when she sings "Well, I've got a brand new pair of roller skates you've got a brand new key". But, when the song was over, the DJ said that the song was full of double-entendre and was an "adult" song. What? I had listened carefully to the words and I didn't notice anything. So, naturally, when I got home, I googled the song and read the lyrics and I still don't notice any double-entendre. I know I can be naive sometimes, but not that naive. I know what I'm looking for here and I still don't see it. I feel like I'm the clueless Mom who gives quizzed looks at her son's friend after asking "Would you like some Kool-Aid with your hot dog, honey?" and the friend goes "Do I want Kool-Aid with my hot dog? Bring it on, baby!" embarrassing the son to no end and confusing the mom. It just makes no sense.
Here. See for yourself.

Brand New Key
( Melanie )
I rode my bicycle past your window last night
I roller skated to your door at daylight
It almost seems like you're avoiding me
I'm okay alone, but you got something I need
Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out you see
I been looking around awhile
You got something for me
Oh! I got a brand new pair of roller skates
You got a brand new key
I ride my bike, I roller skate, don't drive no car
Don't go too fast, but I go pretty far
For somebody who don't drive
I been all around the world
Some people say, I done all right for a girl
Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out you see
I been looking around awhile
You got something for me
Oh! I got a brand new pair of roller skates
You got a brand new key
I asked your mother if you were at home
She said, yes .. But you weren't alone
Oh, sometimes I think that you're avoiding me
I'm okay alone, but you've got something I need
Well, I got a brand new pair of roller skates
You got a brand new key
I think that we should get together and try them out to see
La la la la la la la la, la la la la la la
Oh! I got a brand new pair of roller skates
You got a brand new key

*******************
People say it's about a virgin girl who is chasing after a virgin boy so they can have sex together and lose their virginity with each other. I guess I can see that, but, it is really stretching it for me. No double-entendre intended. heh heh.