 In the 1960s, Tittle observed that female inmates engaging in homosexual activity were more than five times more likely to describe their relationships as emotionally, rather than physically, based.Pseudo-families, also known as familial networks, are social groups of approximately 15 to 20 inmates formed in women's prisons which have been regularly observed by many anthropological and sociological researchers since the 1930s.Within the pseudo-family, inmates take on roles which parallel standard family roles, including parents, children, and siblings, as well as extended family such as aunt, uncle, or grandparent.