Alan: He's worried that when he grows up, he won't be smart enough to have sex.
Judith: Why would he think that?
Alan: Because he hears you giving Herb instructions like he's a blind guy in a mine field

Alan: Jake can hear you two in bed.
Judith: Oh, God! Oh, God!
Herb: He didn't hear that

Judith: Just because he's fifteen doesn't mean he's ready to drive
Jake: I've been driving for years. Grand Theft Auto 1, Grand Theft Auto 2. And I've never drove anyone over except for pimps and crack whores.
Alan: Jake!
Jake: Sorry, dad. Crack prostitutes.

Alan [about Jake]: What's the matter with him?
Judith: His little girlfriend broke up with him.
Alan: Oh, no.
Judith: Yeah, I was hoping you could talk to him, because, let's face it, who knows more about getting dumped?
Alan: You don't have to flatter me, Judith. I'll talk to him.

Judith: Hey, honey, how was your weekend?
Jake: Great. Uncle Charlie's a genius.
Judith [to Alan]: I thought you talked to him.
Alan: I did!
Judith: Then why is Uncle Charlie the genius?
Alan: Because he never got married.

Judith: How did I blow another marriage?
Alan: Oh, Sweetie, you can't blame yourself, although you are the common denominator.

Judith: You don't sleep with your son's friend's mother.
Alan: No, no. you marry his pediatrician.
Herb: He's got you there, sweetie.

Two and a Half Men Quotes

Jake: Can I go back to mom's tomorrow?
Alan: Why?
Jake: I want to hang out with my friends.
Alan: What, all of a sudden your father's not good enough for you?
Jake: It's not "all of a sudden."

Alan: Since when do you have a wet suit?
Charlie: Since I moved to the beach and noticed it was full of hot surfer chicks. If I lived next to Jellystone Park I'd have a bear suit and a picnic basket