"So Grown Up" lyrics

What happened to the boys we fucked with at school?
Now you're in love with a man the same age as your dad
And I'm in love with a girl that I can't stand
What happened to the men we lost our virginity to?
The older we get, the younger we seemed
Two little girls with wet rosy cheeks

And you don't seem all that different now
You act like a woman, but you look like a child
(We're so grown up now)

I forget which skin to slip into
I forget whose skin to get under
I don't know how to behave when I'm sober
Every time I go home I feel like a ghost that stole my own thunder

And you don't seem all that different now
You act like a woman, but you look like a child
And I don't feel all that different now
I look like a woman, but I act like a child
(We're so grown up now)

Don't forget about me, don't forget about me
Don't forget about being seventeen
If only I could shed my skin
(Don't forget about me, don't forget about me)
Slither out and let it rot so I can't slip back in
(Don't forget about being seventeen)

'Cause I don't know how to be myself
Will they want me when my innocence runs out?
And we're so grown up now
(We're so grown up now)
Ending phone calls with, "Look after yourself"
(We're so grown up now)

Does he use those lips to kiss his wife and kids?
You're a good girl, so much better than this