Although men may joke and tease each other about their solo sexual activity, women are typically less forthcoming about their own self-pleasuring. With a very close friend, some may compare notes discretely about the best vibrators or the stress relief going solo can provide. But women's masturbation is not generally a common topic of conversation among girlfriends. Maybe it should be, say sex therapists. They point out that women's masturbation can have benefits both for health and relationships.