Lyric discussion by Firewalker 

Cover art for Hysteria lyrics by Def Leppard

My #1 favorite DL song (and other wise also).

"This is a song about a girl who drives the guy crazy because he wants her so bad. That's why he's "gotta know tonight, if you're alone tonight." He'd go even more batty if he knew she was with someone else. He's pouring his soul out to this girl. "

Couldn't have said it better