This (or rather a quoted conversation) from Anchorman - made me laugh hard:
Brian Fantana: Time to musk up.
[opens cologne cabinet]
Ron Burgundy: Wow. Never ceases to amaze me. What cologne you gonna go with? London Gentleman, or wait. No, no, no. Hold on. Blackbeard's Delight.
Brian Fantana: No, she gets a special cologne... It's called Sex Panther by Odeon. It's illegal in nine countries... Yep, it's made with bits of real panther, so you know it's good.
Ron Burgundy: It's quite pungent.
Brian Fantana: Oh yeah.
Ron Burgundy: It's a formidable scent... It stings the nostrils. In a good way.
Brian Fantana: Yep.
Ron Burgundy: Brian, I'm gonna be honest with you, that smells like pure gasoline.
Brian Fantana: They've done studies, you know. 60% of the time, it works every time.
[cheesy grin]
Ron Burgundy: That doesn't make sense.
My absolute favourite movie conversation quoted.