He should send her back to her hostel

Yesterdaty night after the Critical Thinking replacement class, fews of us walk back to our hostel. On the way my friend, mr Handsome saw her dream girl in MMU. As mr Handsome's friend we know that we should left 2 of them behind and give an opportunity to mr handsome to talk with the girl alone.Ya he managed to do that well. But at last he didn't accompany the girl to go back to her hostel. We said to mr Handsome : "Hey my dear, why don't you accompany her back to her hostel because the road to there is quite dark and not safety enough. As a man, you should behave like a man and accompany her and protect her go back to her hostel because every man or every gentleman should do that."

From our conversation we had use Ad Populum Appeal to Common Practice, which mean we were giving mr Handsome peer pressure to send the girl back since he is a man.