Stewie and Olivia go on a double date with Brian and his girlfriend, Jillian.
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Family Guy Season 5 Episode 7 Quotes

(Brian and Stewie sitting at table)Brian: So what happened?Stewie: Well, you wanna know what I learned this week? Being a grown-up sucks. Women, Brian...what a royal pain in the ass. It's like, it's like, why can't you just hang out with guys, you know? Just live with someone of your own sex. Just do what you would do with women, but with your buddy, you know? Why don't guys just do that?Brian: They do, it's called being gay.Stewie: Oh, that's what gay is? Oh yeah, I could totally get into that.

Lois, I'm just warning you, if this movie turns me gay, I'm gonna start bringin' gay guys home. And I don't mean the classy "maybe they are, maybe they're not" gay guys, I mean those big "Oh my God, here they come, floatin' around, makin' noise" gay guys, not the fix up your house gay guys.

Peter