I just odn't understand why people seem to desire that. Are people that lacking in empathy? How does the thought of having a threesome with your girlfriend and your dad strike you? Or with regard to a daughter and mother, why on earth would you be turned on by a girl who would get with her mother? that girl would be a section 1 loony, yet this is an attractive notion? This is not just me taking the side of my gf, i just don't understand the appeal of a mother and daughter together, it's a disturbing notion.