How to understand "Crack open the sock drawer"? I don't know why it's hilarious.
The original sentence is from Berta in the show Two and a Half Man S2E13 "Sounds like somebody cracked open
the sock drawer last night" .

Question

Answer

Earlier Charlie said to Alan" You are mighty picky for a guy with an adult newsstand in his sock drawer." That means Charlie and Berta know that Alan has a lot of porns in his sock drawer. So when Berta say "Sounds like somebody cracked open the sock drawer last night" since crack open can mean expose to , what she really means is Alan has done some handjob , so she seems happy in the morning?