Lyric discussion by WolvenOne 

Cover art for Polyamorous lyrics by Breaking Benjamin

Normally I would not bother commenting, though it appears as though some clarification is needed.

Polyamory is a neologism which denotes the concept of "multiple loves". It is a hybrid word: 'poly' is Greek for 'many' and 'amor' is Latin for 'love'.

Though, if you are actually interested in what being "poly" entails, and removing the truths from the myths, I recommend the Electronic Journal of Human Sexuality, Volume 6, Feb. 27, 2003.

http://www.ejhs.org/volume6/polyamory.htm

The biggest misconception I am seeing here within the comments of this thread is that you keep interchanging "sex" and "love" which though can exist together, are very much different creatures.

As for what the video is about, it would look as though the first female would be his girlfriend, the one he is more than likely in a monogamous relationship with. The second female (and consequently the third), would be his friend, enjoying her open poly relationship, which he appears to be enticed by, and getting dragged into.

For those who have made the conversion from monogamy to poly, you may be all too familiar with this situation. Just my 2 cents.