Yes, it's the fact that ALL MEN ARE DOGS. And to be clear, I don't mean our four-legged faithful friend like Oliver over here, who wouldn't hurt a fly. I do mean the two-legged one who is probably knocking on your door, even as you read this.
Fortunately or unfortunately, sex drive is part of our DNA. Humanity has struggled with it for millennia and will continue to do so for a very long time. The push-me, pull-you that a man usually feels when meeting someone new, hopefully evolves into a civilized relationship, which we call romance.
Regardless of my theories, I've alway been a sucker for romance, so I'll leave it at that. HAPPY St. VALENTINE'S DAY everyone.