“Consanguineous sex, relationships, or marriage ruins, confuses, or distorts family relationships.” First of all, this does not apply to adoptees who reunite as adults, or people who resulted from gamete or embryo donation. They already have families.
People only say this about sex and marriage. They don’t say it about friendships, working together, or any number of additional relationship dimensions family members might have with each other, or at least this objection is not enshrined in law, as it is with laws that deny marriage equality. It is as if these people think sex and marriage are bad things and about doing bad things to the other person(s). Are those who oppose equality frustrated? Are they doing sex wrong?
Many people have many relationships that have more than one aspect. Some women say their sister is their best friend. Why can’t their sister be a wife, too? When someone gets married, nobody from the government asks if this will ruin their friendship or their business, and it should not ask if it will ruin their fraternity, either.
Some people do also apply this to same-gender relationships. Friendships, these people say, become potential sexual relationships; it confuses relationships because men are supposed to be friends and not lovers, they say. If that is the limitation people want to place on themselves, they can. They should not be able to place such limits on other consenting adults.
When people are functioning socially in their biological roles, sex would create an additional bond. For some who are not functioning socially in those roles (as is often the case with Genetic Sexual Attraction), that bond may not exist in the first place and this is a way to form one. It should be up to them what kind of a relationship they're going to have.
People who are related through birth, adoption, or marriage (stepfamily) may or may not get along. They may be cruel towards each other or they can be best friends. The law can't force adults to love each other, regardless of their relation, and it shouldn't stop them from loving each other however they mutually agree.
There is no good reason to deny an adult, regardless of gender, sexual orientation, race or religion, the right to share love, sex, residence, and marriage (and any of those without the others) with any and all consenting adults without prosecution, bullying, or discrimination.
Feel free to share, copy and paste, and otherwise distribute. This has been adapted from this page at Full Marriage Equality: http://marriage-equality.blogspot.com/p/discredited-invalid-arguments.html
Go to NOT a Good Reason to Deny (Polyamorous) Love #16
Go to NOT a Good Reason to Deny (Consanguineous) Love #18