MILFdom and gender bending friendships

I'm fairly certain I got hit on at Starbucks today.

On Sunday, whilst preparing for MJ's party (the details of which I still owe you), I put my hand directly on a yellowjacket.  I haven't done great at not cursing in front of MJ, but that was a whole new territory of "not great".  Before my ring finger swelled up, I decided I should take my wedding ring off. 

So I'm going ringless for a few days.  Mr. Guy at Starbucks appeared old enough to have done the ring-finger-check.  It's nice to know I still got it.  Though Mr. Guy doesn't know that there used to be a lot more of "it", and his lack of suave suggests he was just going after the weakest gazelle on the savanna, it's still nice.  Before getting married I told DH that one of my goals in life was to be a MILF.  I never specified whose definition of MILF that would be.   

On an only-slightly-related note, I've lately been pondering the subject of friendship between men and women.  I remember (or, possibly, misremember) a conversation between my stepmom and I when I was a teenager and swore that some boy was "just a friend".  She told me that it's impossible for men and women to be just friends.  At the time I thought she was totally wrong, but after many (like, 5) dates-that-I-didn't-realize-were-dates-until-some-guy-tried-to-kiss-me in college, I started to wonder if she's right.  Not in the they-can-never-be-friends sense, but in the they-can-never-be-CLOSE-friends sense.  The kind of friend you have deep conversations with, tell secrets to, etc. 

Furthermore, the desire to have guys as "just friends" is seemingly far stronger from women than men.  Nearly every woman I know claims that "most of her friends are guys", which is mathematically impossible.  Granted, most the women I know are somehow related to Geology, so for this group it may be true.  But it extends beyond that.  In contrast, I have never met a straight man who claims that "most of his friends are women".  Men seem to understand the "impossibility".

So what do you think?  Is it impossible?  Do you even care to have close friends of the opposite sex?