Holmes has done an admirable job of including women of every sexual preference; there are women who masturbate with 200 other people, women who cuckold over the internet, mothers who find it difficult to be a mother and a lover, tantric sex practitioners, and pensioners who use Tinder but worry about their knees on the kitchen floor. Generally, the older they are the more confident — Vivian, 70, from the US, says: “I thought the idea was to be in love, now I just want what I want when I want it.” Sadly, there are too many in this book just waiting for it to be over.