MARTIN: And you fooled around in high school together?
EDDIE: Yeah. Sure. Everybody fooled around in high school. Didn't you?
MARTIN: No. I never did.
EDDIE: Maybe you should have, Martin.
MARTIN: Well, not with my sister.
EDDIE: No, I wouldn't recommend that. (486-491)
Even though Eddie clearly is no model for how to conduct a teen romance in a safe and healthy way, he is still playing Mr. Macho for Martin, trying to look down his nose at the other man for not having fooled around in high school. Although he's generally got all the archness of overcooked pasta, even Martin knows to call shenanigans on that nonsense, suggesting that perhaps fooling around isn't all it's cracked up to be if one's siblings are involved.