exclaimation points!!!!!

I've decided one of the biggest differences between men and women (besides one is male and the other is female), is that men don't use exclaimation points in their emails. For example, if I get an email from one of my female customers it reads something like this -
OMG!!! Thank you soooooo much getting me the cards so quickly!!!!
If I get one from one of my male customers it reads like this -
Got em. Thnks.
So, why do you think this is the case? Is it because women are more emotional than men? Is it because women are more expressive than men? More creative? More exuberant?
Whatever the case, I don't see how anyone can write and get their point across without using exclaimation points!!! Do you know what I mean, sisters????!!!!!