Kinky Spiders: Males Tie Up Partners During Sex. "Fifty Shades of Grey," spider-style. A male Nursery-web Spider restrains a female during sex by wrapping silk around her legs. Tying up your lover is one way to introduce a little excitement to the bedroom. But for male nursery-web spiders, bondage during mating can be a matter of life and death. By restraining their partners, male spiders reduce their chances of falling victim to sexual cannibalism, a new study finds.