Your thighs, your knees
It's bringin' me to my knees
Your knees, your thighs
It's no surprise
Your thighs, your knees
Is what I need

The story:

My friend Robin had just started dating this guy, and we had heard the song on the radio on our way to meet up with him. We both thought that's what the song said, so we started asking him the name of "that Def Leppard song about thighs." He looked very confused, and then we sang it for him. He paused, trying not to laugh, and then calmly said, "the song is called Love Bites." That still didn't register. He looked up the lyrics online and read them to us. We were both pretty embarrassed, especially since we had asked other people about the "thigh song" before.