Please remind me why Jay Leno still has a job

I'm not one to randomly start harping about a celebrity just because they get on my nerves (we have more important things to worry about here, after all -- and besides, there's not nearly enough room on this site to handle that much complaining), but for some reason the interview I watched this morning of Dominic Monaghan on Jay Leno just won't leave me be. Monaghan is of course the reformed Hobbit who has been playing an ex-junkie rocker on Lost, and Leno is the guy that stumbled into one of the cushiest hosting gigs in television history despite having little or no talent.

Get a load of the diaper-bomb that Archie -- sorry, Jay -- drops upon noticing that Monaghan has what appears to be black nail polish on one of his fingers:

Jay Leno: I'm hoping -- I'm hoping you slammed that in a door.

Dominic Monaghan: Well, you'd have to slam it pretty hard to do that...

JL: Maybe an engine block fell on it, it turned it black...

DM: No.

JL: Don't tell me that you actually painted it. Now, why --

DM: I'm going to disarm you here and say that it's nail polish.

JL: (visibly disgusted) Now why -- what is the advantage of that?

DM: Maybe no one ever told me that makeup's just for girls -- maybe they should have

JL: I'm telling you now...

I'll give you three guesses where the discussion goes from there: Jay trots out the "don't the girls you date get jealous of your hogging the mirror?" line (no, they don't), the "do you share makeup" line (yes, they do), and even an inspired, "well, do you do other normal guy things like refuse to stop to ask for directions, or are you a total alien?" line of questioning (Monaghan replies that of course he stops to ask for directions, like any sane person). Leno even asks if Monaghan is wearing panties under his suit.

Is it just me, or are Leno's "battle of the sexes" comedy chestnuts about 20 years stale? How does this guy still have a show? I love how Monaghan just keeps saying, "well, I like it" and letting it drop, but that Leno keeps coming back to the topic like a dog who's too stupid to remember that his water dish has been moved. And perhaps the real joke here is that Monaghan is notably involved with amazingly gorgeous costar Evangeline Lilly, so what Leno and his 350 classic cars apparently see as a lack of manliness isn't exactly doing him any harm in the dating department.

Anyway, I'll shut up -- but the clip is after the jump, and it's worth watching if you're in the mood to revisit some timely comedy circa 1983.