I think we are kinda talking across each other here. What REALLY is incest? Casual definition might be sex between relatives. But if you have to exact about it, it really only applies to sex acts between a man and a woman with very close blood relation. Would you call sex between cousins incest? What about a man with his brother's wife? Or between uncle and niece? In real life, we all probably know someone or a friend of a friend who know someone who had an affair with her cousin's husband or something like that. There's even a famous actor who married his step-daughter or something(?).
There are all kinds of sexual pairings that's morally iffy, say a teacher+student, or doctor+patient or boss+employee. But incest between close blood relatives has an extra yuck factor that seems biologically WRONG, almost borderline on bestiality. Hetero 3P/4P sex involving a pair of same-sex siblings or family members doesn't quite fall in this category, IMHO. Say, two sisters taking turn sucking the same cock. Or two brothers DP a girl. Are these acts of incest? I'd say no.
What about homosexual intercourse within the family. That's much more debatable. Two sisters licking each other's pussy? A father sodomizing his son? Emotionally I just can't equate lesbian and gay sex. Without involving sperm, it's as if it's not real sex. So two women, related or not, seems to me just fooling around no matter what is being inserted into which orifices. What about the second case? It seems to qualify as incest. I know it's not entirely logical and I may be politically incorrect here.
What I'm getting at is the particular yuck or sick factor in incest, in love and/or sex between family members. In general, any kind of nakedness, physical contact, pleasure/pain seeking or causing all contain some feeling of privacy or embarrassment. Most people would feel a bit yuck about masturbation in the presence of another person, no matter if he/she is related or not. So if person A participating in person B's masturbation may be qualify as having sex between the two, but does it matter much that A and B are related or not? I think it no, so if a woman A gives man B a handjob, yes that's sex, but if A is B's sister, is that incest? If it's a "clean" hand job meaning the sperm doesn't enter her body or lands on her face or hand or skin, than maybe it's not that sick or against Natural Laws. But if it's a blowjob? If he shoots his sperm into his sister's mouth? Yes that's incest, that's wrong, in the biblical sense. Get it? What if he's wearing a condom? What if he ejaculate inside her orifice but the sperm never make contact, due to the condom? Yes that still count as incest.
Another classroom case. Sex involved in a power relation, e.g. boss and secretary, teacher and student. The younger junior person is not in a position to refuse sexual advances made by the boss or teacher. Or the patient need to be undressed or touched or probed by a doctor, or even drugged. So the boss or teacher or doctor taking sexual advantages is considered a villain. Yet I enjoy watching JAV of such themes. Right? But not between parents and children, right? Get it? It's wrong for a teacher to r*** his student, it's wrong for a father to r*** his children, yet the first case can make a JAV enjoyable for me, the second case makes it sick and taboo.
Makes sense? Maybe not totally scientific or logical. But my feeling is that incest is very yuck, very sick, very wrong. While I do have a decent collection of sister porns such as
So what's "Sick! I love it", what's "SICK, turn it off!"? I think my line is: a man (boy) ejaculating onto or inside another person who has close blood relation (with or without condom). As mentioned in another thread, one girl sucking sperm from insider her sister or mother's pussy or rectum? Excellent! As long as the sperm comes from a man who's not blood relation. So a girl sucking her brother-in-law's sperm from her sister's asshole? Good! A girl sucking her father's sperm from her mother's asshole? BAD! A girl sucking her brother's sperm from her sister-in-law's ass hole? Bad!
With me??? Y'all probably think I'm anal retentive