OK, girls, here's something you must understand:

At some point every boy will look at a girl and say to himself, "What are the chances of me sleeping with her?"

Every one of them. Your postman, teacher, friend or husband.

Doesn't matter if they're the checkout clerk, a total stranger or your sister.

Now the smart boys will follow this up with, "What are the chances that they want to sleep with me?" But that's only the smart ones, and there's not many of those.

The smartest ones will follow that up with, "Probably zero or less."

Those rare few are the ones who are not making the world a complicated, awkward and sometimes miserable place for women. Or at least are trying.

If you understand this, you'll have a key piece of figuring out why men act the way they do.