Lex is looking awfully maniacal there. That ain't just a birthday laugh.
'It's my birthday! MWAHAHAHAHA!'
Right, right, slow down there, Lex. It's not like you ASKED to be born.
'You're damn right I didn't! I DEMANDED it! I walked right up to my mother, and took her by the shirtfront, and said 'Mom, either I'm born right now, or I'll kick your ass!''
How did you walk up to your mother and take her by the shirtfront if you hadn't been born yet?