Center of gravity

In crowded bars, at subway cars Whenever you are next to me,
center of gravity,
can't feel both feet on the ground Walking home after dark, past the softball park It's clear to me, according to a rule I learned one day in school
Basic geometry: two halves of a circle, you and me It's a familial song we've known so long Your clever cuts into me
as long as you're next to me
I can't feel both feet on the ground