Boys are always happy creatures.. Why?

Boys are always happy creatures.
Why?

1: There last name stays with them forever
2: Phone conversations last for a minuter or flat
3: A five days vacation requires only one jeans
4: If someone forgets to invite them, He can still be their friend
5: The same hairstyle lasts for months or even years
6: They can do shoping for 25 relatives in 25 minutes
7: They don’t bother how ugly or pretty they look
8: They are smart enough in keeping secrets
9: They compromise and sacrifice easily so as to keep people happy
10: They don’t freak out in parties, when they see another man wearing the same shirt…..
Instead, they become buddies