troilism /ˈtɹɔɪlɪz(ə)m/ noun2 •The practice of two people having sex while a third person watches (and may or may not take part).Troilism is primarily a male problem, but one case of a woman who watched her husband have intercourse with a young girl has been reported in the literature (Smith, 1976). — 1981 •The practice of three people having sex, i.e. having threesomes.
