Pigeon Hole Principle states a woman can't have more than three boyfriends at a time.

Of course, it amazes me that it took mankind until 1834 to discover the obvious.

Well of course there are some not so obvious implications like right now there is someone out there with the exact same number of hairs on their head.

Or if you had 10 black socks and 12 red socks you only need to draw three socks at random without putting them back in to get a matching pair.

Or that if one considers an n-dimensional hypercube, and connect each pair of vertices to obtain a complete graph on 2n vertices. Then colour each of the edges of this graph using only the colours red and black. What is the smallest value of n for which every possible such colouring must necessarily contain a single-coloured complete sub-graph with 4 vertices that lies in a plane? It would possibly take a number so large that there is simply not enough matter in the universe to create the ink to write it.

But as far as anyone here should be concerned, if you are going to have an orgy the maximum ratio of guys to girls should be 3:1 unless you are expecting some male on male homosexuality.

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Well sir that seems to be someone else's problem.