It's frowned upon to be aggressive.
Brad is at a party and sees a girl he is attracted to.
Brad wants to make a move on the girl.
Brad casually chats with the girl and stops after she showed no interest.
Brad keeps hitting on the girl despite the girl telling him how she wasn't interested.
Brad chats with other partygoers and enjoys the rest of the party.
The girl angrily leaves and other partygoers are annoyed at Brad.