"There will always be a battle between the sexes because men and women want different things," quipped comedian George Burns. "Men want women and women want men." But when men want men and women want women, each couple can circumvent treacherous romantic terrain because partners more closely share sexual appetites and mind-reading abilities than do heterosexual pairs. Most lesbians don't fear rapacious women and gay men need not always soft-peddle their sexual predilections. On balance, gays and lesbians understand their partners' bodies and biases with a certainty that many a clueless "breeder" yearns for. "Homosexuality could be viewed in some...