You and your friends ain't as cool as you think,
Fake-laugh at your jokes, then tell you I need a drink.
And I know that she'd listen when she came through the kitchen
With my back to the sink, I know I probably shouldn't.
 
But it feels so good, I wanna die.
 
With her hands in my hair, oh, I love the way she touches.
I'm a mess, I don't care and I kinda fucking love it, boy.
You should've known I'd have a better time with her,
Ooh-ooh-ooh. Thank God you introduced me to your sister.

Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na, na-na-na-na-na (to your sister).
Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na-na.
 
She undressed me with her eyes and, somehow, you didn't see,
Put her hand on my thigh, felt like a hundred degrees.
Said I needed the bathroom, now, we're up in her bedroom,
With her lips on my neck, I know I probably shouldn't.
 
And it feels so good, I wanna die.
 
With her hands in my hair, oh, I love the way she touches.
I'm a mess, I don't care and I kinda fucking love it, boy.
You should've known I'd have a better time with her,
Ooh-ooh-ooh. Thank God you introduced me to your sister.

Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na, na-na-na-na-na (to your sister).
Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na-na.
 
With her hands in my hair, oh, I love the way she touches.
I'm a mess, I don't care and I kinda fucking love it, boy.
You should've known I'd have a better time with her,
Ooh-ooh-ooh. Thank God ...
 
With her hands in my hair, oh, I love the way she touches.
I'm a mess, I don't care and I kinda fucking love it, boy.
You should've known I'd have a better time with her,
Ooh-ooh-ooh. Thank God you introduced me to your sister.

Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na, na-na-na-na-na (to your sister).
Na-na-na-na, na-na-na-na-na-na,
Na-na-na-na-na.