>>513611769
The funny thing about the pro-incest arguments I've heard is that it's usually from people who don't even have a sibling of the opposite sex. If they did, they would know two things:

#1 You will just not be sexually attracted to them no matter what. This is by nature's design. It's biological fact that siblings who grow up in the same household together just naturally don't look at each other that way, never needing to be taught that incest is bad, except in extreme outlier cases (usually some kind of mental handicap - insanity or very low IQ).

#2 Growing up in the same household together, you will get to know each other's most repulsive behaviors, habits, and beliefs. Not to mention, before puberty, you will be knocking the shit out of each other before the disparity of upper body strength sets in. After puberty, you may be inadvertently or actively sabotaging each other's dating life with other kids. After a childhood like that, fucking each other will be the farthest thing on your mind.