I borrowed this line from a book written by David P. Barash. I haven't read the book yet. I'm still looking for it but the title itself is so true. Monogamy IS a myth.
Source here:
Random Ramblings From My Daily Life: The Myth of Monogamy
Note: PLEASE READ LINK FIRST BEFORE MO MOYAWIT. Kapoy sige atiman anang mga palag na wa pa gani kabasa. You're only proving my point.