Come on Grayson, you're better than that.

Making fun of Lex Luthor for being bald seems somewhat beneath you, Dick Grayson. You've been making fun of super-villains since you hit puberty, so I'd really expect better material at this point in your career of insulting your foes.

Yes, calling attention to Luthor's lack of hair  probably is a good way to get under Luthor's skin, as we all know he's quite sensitive about being bald–in fact, permanently losing his hair after Superboy blew it out while fighting a lab fire is the entire reason Luthor went into villainy in the first place and has had a 70+ year grudge against the Man of Steel.

But Mr. Clean?

The Hair Club For Men?

For shame, Grayson. I'm surprised you didn't throw out "curly," "cue ball" and "Kojak" while you were at it. Step up your game, Dick.

(From Grayson #11, written by Tim Seeley and Tom King, drawn by Mikel Janin and colored by Jeromy Cox)