I described this to a friend once as being the base of the world’s greatest isoscelese triangle.
Word.
Exactly. I’m not saying it wasn’t fun. It was. But there are times when a buffet pales next to a well-prepared single meal. There can be such a thing as “too much to choose from.” 
So one woman would have someone to talk to after I die of a massive heart attack—that’s the only advantage in my case.
I think men are somewhat like impatient, greedy little children at the ice cream van in this respect; cmkeller takes the parental role of trying to say that one ice cream should be plenty for any child, after all, you can’t eat two ice creams at once and what if one of them melts and goes drippy while you’re licking the other?
But for the kids, there is no question that it’s desirable to have two ice creams - if one ice cream is good, two ice creams should be at least twice as good - the practicalities don’t get a second thought and even if they did, the lure of having two ice creams is sufficiently strong that they’re prepared to give it a damn good try anyway, even if it is messy and inconvenient.
Worse, it can be incredibly hot and make “normal” sex seem that much less “exciting” by comparison.
To put it another way, don’t end up like me, experiencing it and then not being able to get it again. It’s the worst kind of torture, and what’s worse is that it’s a somewhat difficult problem to talk to people about- very few people I know, male or female, can understand why I want or need other women when I have a fiancee… that’s probably a topic for another thread, though. Sorry for the hijack.
I fail to understand what the OP could learn by reading about the Milken Family Foundation: 2007 Annual National Education Conference: Shaping the Future: Educational Excellence in a Global Economy.
A truly disappointing google search. And a waste of hand cream and tissue.
The man says in his OP that he doesn’t do porn, and I assume that he won’t break that just for curiosity’s sake.
As for this:
I have been approached for threesomes a few times (four that I can think of) and in only one of the cases, was a more permanent arrangement not part of the request. On their parts, anyway. Beats me as to why, and I’m sure it’s not usual.
And this, my friends, is why Giraffe is a moderator.
That’s assuming the women are the same height…
The idea isn’t necessarily to do everything at once. It’s best to take your time. Switch back and forth, let the girls go at each other a little. Don’t try to envision a static shot of how 3 people could be placed. Instead, imagine all the things you can do normally, except doing it twice!
Just for the record:
Some men, or possibly even most men; certainly not all men. I’m entirely honest when I say that the two-women-at-once scenario does absolutely nothing for me. I’ve had it proposed; I wasn’t interested.
Seriously. I fast-forward through MFF and G/G scenes in adult movies.
That doesn’t mean I think the men who do like this stuff are weird, or wrong, or that my preference for one-on-one is superior. It’s just different.
One NAKED girl is great two Naked girls is better, Three? Four? More?? Ok, so you can’t DO that many at once but you will be able to brag about it forever.
GEORGE CARLIN: Here’s somethin’ about me . . . I never fucked a 10, but one night I fucked five 2’s! And I think that should go down as a positive achievement!
Oh, I think most guys can understand that, with or without the 3-way element involved! 
Identical twins usually are.
Amen to that.
And to that too.
Here’s how I’ve always understood the fantasy: both women give the guy lots of attention of the sort Miller describes (and if such attention from one woman is good, as Happy Scrappy says, such attention from two women is better), eventually turning into some sort of intercourse (perhaps genital, perhaps fellatio) with one of the women.
While he’s recuperating, the two women get it on with each other in a mutually satisfying manner, providing a terrific visual treat for the guy. By the time they’re done, he should be more than ready for sex with the second woman.
In the past, with my ex-wife, the situation went like this:
Girl 1 and girl 2 would enjoy each other for a while.
Then girl1 and girl 2 would shift to me, for a little while.
Then myself and, say, girl 1 would work on girl 2 (this often included me penetrating girl 2), then the dynamic would switch to myself and girl 2 working on girl 1.
In most instances, if I was still going at this point, the wife would watch me with Other Girl until she was ready again.
Repeat until exhausted.
Good times, and one of the only thing I miss about the ex.
For me, it’s more like tag-team wrestling. I be sexing up one woman and when she while the other watches and is begging the first one to be let into ring. When the first one can’t take anymore and needs a break she tags her partner and switches places. Sooner or later they both end up in the ring with me and sometimes the referee gets involved.
Yes, there are screaming crowds as well.
Eh, just ignore them. You accepted your red card gracefully, you got off the field so their damn kids can play soccer, what more do they want?
That’s my experience exactly. A few decades ago I was the houseboy in a Berkeley sorority, and this sort of thing happened from time to time. I’m the sort for whom one woman can be completely absorbing, and dividing my attention tended to be distracting. Still fun and I never turned it down, but curiously it was never quite as riveting as I had expected.