The average lifespan of partnered homosexuals is almost one-third shorter than that of married heterosexuals, according to a recent US study. Babette Francis reports.Marriage between a man and woman improves life expectancy for both; but “married” homosexuals, both gays and lesbians, live about 24 years less than their married heterosexual counterparts.These findings were recently published by Paul Cameron, PhD, of the Family Research Institute, a Colorado-based think tank, in a stud…