If two twin sisters who are both 18 years old and they both want to marry eachother I think legally they should be allowed to do it because what they’re doing isn’t hurting anybody.

I agree that incest is weird and gross but it’s still not morally wrong for two twin sisters who are both consenting adults to marry eachother because what they’re doing is completely harmless and isn’t hurting anybody. So they deserve to have the right to marry eachother if they want to just like everyone else that isn’t related to their spouse.