Alex: I know they did it, they killed her, they, killed her... Robin, Robin.
Kelly: Oh Drew, there was this horrible voice, on the telephone.
Drew: A heavy breather?
Kelly: No, worse than that.
Drew: He turned you on, didn't he? I ought to try that sometime.
Kelly: I'm serious.
Drew: So am I.
Jude: Who are you?
Slick: Seymour Crane! But, they uh, they call me Slick.
Kim: Women in love, coming through.
Answer: Alex is not the typical one dimensional slasher serial killer, but rather a complex individual with conflicting motivations. The lipstick is a symbol that he is portraying the hurtful people from his past even as he kills them.