It's the perogative of the friends of a man who carries any kind of man bag to harrass him. It's a man law.
Maybe you just have weird friends. But my husband's friends do that kind of thing with each other all the time. Teasing, prodding, poking. It's how they discover the limits of your dickiness, ie: weakness. If they reach the limit, in our friend group, it had better not be too soon or you will be shunned. It's the new millennium version of sparring. Just safer than with broadswords.
Jennifer