That's crap. My best friend of many years is a guy. He doesn't look to me for masculine companionship - he has other guys for that - and he certainly doesn't seek me out for my "kindness, thoughtfulness, sensitivity, support, and nurturing heart".
(I hope he sees that - he will die
)
We seek each other out because we are each other's friend who will tell it straight, no sugar. We all tiptoe a bit in our romantic relationships because we don't want to provoke or offend our SO, and that is as it should be. With a male/female close friendship there are no such boundaries, and that is refreshing. He doesn't act right in front of me because he wants sex; he lets it all hang out with me so he can act right in front of his woman so
she will give him sex. It's the same with Monello - I would never talk in front of him like I talk to my bestie. It's very similar to a brother/sister bond (not that I have any brothers, but I see my son and daughter in action).
I think everyone should have a close friend of the opposite sex. They bring a perspective to the table that your same-sex friends don't.