"Kick My Way Into Her Heart" is a song that appears in Heinz Doofenshmirtz's flashback as he could do a kickball to impress his mother.
Heinz Doofenshmirtz: You see, Perry the Platypus, throughout my childhood, my mother's love was always inexplicably linked to kickball.
You know, I think-I think this is best expressed through a song.
My mother's love was always inexplicably linked to kickball,
and my brother was an expert from the start.
But I lacked finesse, so when put to the test,
I couldn't kick my way right into her heart.
Ladies and gentlemen, Love Händel!
Love Händel: Oh yeah.
He tried playing rugby, and soccer and football,
He tried kick the can and even martial arts.
But even with this dedication,
Heinz Doofenshmirtz: I still got no coordination.
Love Händel: He couldn't kick his way right into her heart.