Few reasons:
1. Their last name stays with them forever.
2. Phone Conversations last just for 30 secs flat.
3. A five day vaccation requires only 1 jeans.
4. If someone forgets to invite them,he can still be their friend.
5.The same hair style lasts for years or even decades.
6. They can do shopping for 25 relatives in 25 mins.
7. They dont freak out when they go to a party n see another man wearing the same shirt. Instead they are busy watching girls.