What is the effect of sexual orientation on a person's life expectancy?

¹⁸ To spell the point out: life expectancy, see Maj. Op. at 11617, citing L.A. Dep't of Water & Power v. Manhart , 435 U.S. 702, 98 S.Ct. 1370, 55 L.Ed.2d 657 (1978), may be quite literally a mathematical "function of sex," to the extent that with knowledge of a person's sex, one can calculate his or her life expectancy, which will differ from that of a member of the opposite sex. Whatever the majority means by its assertion that "sexual orientation is a function of sex," Maj. Op. at 119, it plainly does not mean anything like that.