I did a quick Google search for "Lesbian Death Bed". Interesting.
But the phrase was not coined by lesbians. It was coined by
University of Washington sociologist
Pepper Schwartz in her 1983 book
American Couples. There has been some controversy about the claims, since the definition of sex is often penile insertion (the study that coined teh phrase was done in the 1970s and published in 1983).
But there is another interesting factor, that of length of time and satisfaction. Apparently, the average heterosexual encounter lasts 15-30 mins. The lesbian sex encounters last 30-45 mins.
from:
Lesbians May Have Sex Less Often, But When They Do It, They Make It Count
"Consistent with past research, women in same-sex relationships reported having sex significantly less often than persons in both mixed-sex and male same-sex relationships. However, women in same-sex relationships reported significantly longer durations of sexual activity than all other groups.
Consider this: for women in same-sex relationships, the median (50th percentile)
time spent on sex was 30-45 minutes; in comparison, the median for everyone else was 15-30 minutes. It is also worth noting about 20% of women in same-sex relationships reported spending an hour or more on sex, while durations of this length were far less common among the other types of couples studied.
It is also worth noting that there were no differences in sexual satisfaction across couple types. This suggests that the group differences in sexual frequency were counterbalanced by the group differences in sexual duration."
In other words, they have it less frequently but have it for much longer. Sounds like a balance to me.
Another interesting bit concerns orgasms. from:
Why Do Lesbians Have More Orgasms Than Straight Women?
"Lesbians have more orgasms than straight and bisexual women. A study by Garcia, Lloyd, Wallen & Fisher (2014) surveyed a nationally representative sample of 6,151 women and men. The study demonstrated that for women, the rate of orgasm varied by sexual orientation.The mean occurrence rate for heterosexual women was 61.6%, 58% for bisexual women, and 74.4% for lesbian women."
But I am still doubtful about the claim that lesbians have more sex with men than straight women do.