How we cite our quotes: (line number)
Quote #7
PETER: (With disgust and impotence) Great God, I just came here to read and now you want me to give up the bench. You're mad. (238)
The stage directions mention Peter's "impotence." Jerry is coming onto Peter's bench and that makes Peter less of a man, both because men are supposed to fight—in this case, fight for their bench—and because Jerry encroaching on Peter's space raises the possibility of homosexual affection (which the play ambivalently sees as unmanly).
Quote #8
PETER: You've pushed me to it. Get up and fight.
JERRY: Like a man?
PETER: (Still angry) Yes, like a man, if you insist on mocking me even further. (254-256)
Manly men doing manly things near a bench.
Quote #9
(Spits in PETER's face) You couldn't even get your wife with a male child. (267)
Again, Peter is portrayed as impotent and not manly enough. This is also through Jerry making fun of Peter's relationship with his wife in order to get Peter to physically attack him. Sneering at the heterosexual relationship is a way to push Peter into a kind of homosexual relationship.