Perhaps queer is political, whereas gay means you have at at least one single point in your life contemplated or even executed an erotic encounter with a member of your own sex, no matter how drunk, fleeting, insincere, passionate, or remunerated. It's like white + black = black, and white + white + white + black = black in that a single drunken fling at 16 tars you gay for life, no matter what your wife says.