Should incest and/or bigamy be legal?

I know they're two different things, but they're somewhat connected, multiple spouses and spouses that you are related to. Since first-cousin marriage is legal in some places, I am referring to incest between siblings or children and their parents. All participants must be of legal age, and we're supposing no grooming took place.

Yes
No
Only incest
Only bigamy
Select gender and age to cast your vote:
Should incest and/or bigamy be legal?
Post Opinion