#12: No Need For a Second Trip
I’m not sure exactly where this particular rule of masculinity originated, but it seems pretty close to universal. Boys as young as eight or nine know that they have to sling all five or six shopping bags from their arms, elbows, thumbs, and pinkies, or else they have not really completed the task.
As they get older, they understand that no matter how much the shopping list grows, the list still applies. There is no such amount of shopping bags as can justify a second trip. I know each of my fingers by how many cartons of eggs or bottles of milk they can carry.