The term lesbian bed death was coined by the sociologists Pepper Schwartz and Philip Blumstein in their book, American Couples: Money, Work, Sex. Schwartz concluded that lesbians have less sex than straight or gay couples and, with that, lesbian bed death became a thing.
The third National Survey of Sexual Attitudes and Lifestyles (Natsal-3) found that 51% of women had experienced sexual difficulties in the last year. So why has this notion that women who have sex with women are more likely to suffer stuck?