Dare to Ask: Marriage, relatively speaking

By PHILLIP MILANO

Question

How far down the cousin chain does it go before it is legal to marry a relative?

David, Fernandina Beach

Replies

In New Zealand it is legal for first cousins to marry – but not for second cousins. Don’t ask me about the logic for that, but I always presumed it was due to genetic differentiation.

Paula, 40, New Zealand

States have different laws regarding this. In 21 states, it is legal for first cousins to marry, and Florida is one of them. Twenty-five states prohibit it, and several others have variable laws. I have not heard of any restrictions further along the “cousins” chain.

Laura, 50, Jacksonville

Expert says

Not to kiss and tell, but if you wanna get your nuptial on with your first cousin, you can do it full-on legally in 19 states, including Florida and Georgia. Another six states allow it with preconditions, like Maine, where you need genetic counseling first. Another 25 flat-out say “Nope, ain’t gonna happen here.” (New Zealand also allows cousins to marry, even second cousins.)

Medically speaking, there’s a myth that having first-cousin sex means Earth will be running amok with banjo-playing, blank-eyed trolls. Yes, there’s a slightly greater risk a child born of first cousins will have birth defects, like spina bifida or cystic fibrosis. But we emphasize “slightly.” Scientists reported in The Journal of Genetic Counseling in 2002 that while the risk in the general population of having a child with a serious problem is about 3 to 4 percent, first-cousin biblical acts increase that by another 1.7 to 2.8 percentage points. That’s about the same risk level as for a woman who gives birth after age 40.

The small risk increase from kin coupling is due to a stronger likelihood that bad recessive genes will pair up, but that’s not because the breeders are first cousins, researchers say; it’s because there may be bad genes in their family pool overall.

So why is much of America still creeped out by first-cousin marriage when most other developed nations aren’t?

First, there was some lousy evolutionary science in the late 1800s that scared folks about cousin marriages, said Martin Ottenheimer, retired Kansas State University anthropology professor and author of Forbidden Relatives: The American Myth of Cousin Marriage. Though it was later discredited, it took hold in the U.S. more than in Europe.

Second, as new territories wanted to become part of the growing Union, they wanted to impress the colonies with their upright ways, so they passed anti-cousin marriage laws.

“At the time, there was concern that people would become savages,” Ottenheimer said. “We wanted to appear civilized to ourselves and to Europeans – even though Europeans were having cousin marriages!”

The issue remains emotional, said Ottenheimer, who questions laws outlawing such marriages.

“I still get negative reaction. One woman on a talk show said I was going to hell. But, it’s not even prohibited in the Bible.”