One would think the roughly 10% gap between men and women (mentioned in the article) could not be explained by more frequent homosexual sexual encounters if it

One would think the roughly 10% gap between men and women (mentioned in the article) could not be explained by more frequent homosexual sexual encounters if it is assumed that homosexual men and women have close to the same amount of sex. It seems reasonable to assume that lesbians don't have sex at a disproportionately greater rate than gay men.