"Last Kiss" is about blow jobs
First line:
I still remember the look on your face

You can't see the look on someone's face as you're kissing them. At best, you can see their eyes. How do we know that Taylor Swift is "kissing" this boy. Look at the title "Last Kiss." We therefore now this song will be about "kissing." So if Taylor Swift is kissing this boy but can see the look on his face, what/ where is she kissing him?