I think the song is about how you can't just rush a relationship or it gets stale too quickly. "You gotta make me shut up" might mean that he's revealing his feelings too much. Part of the fun in the beginning is the mystery that is destroyed by saying "I love you."
The second half is the same thing, but from a physical perspective.
There is a kind of repressed fury in this song.
I think the song is about how you can't just rush a relationship or it gets stale too quickly. "You gotta make me shut up" might mean that he's revealing his feelings too much. Part of the fun in the beginning is the mystery that is destroyed by saying "I love you."
The second half is the same thing, but from a physical perspective.