I want to have sex with my cousin. She's quite beautiful and has a fantastic body. I want her and I to screw nastily but quietly at a family reunion when no one is looking.
As far as I know, it's a modern taboo. Cousins used to be routinely married to each other in arranged marriages (and still are in some places). Or maybe it comes from extended families that live together. Anyone you grow up with sets off your incest-avoidance instinct, and you won't want to fuck them when you hit puberty. The problem with this is that when blood siblings separated by adoption meet, they are usually insanely attracted to each other. I've heard so many cases of siblings fucking when ruinited after being separated in infancy, that the whole "incest-avoidance psychology module" theory was totally and completely nailed for me. (Others foolishly thinks this disproves an evolutionary psychology explanation of incest. Talk about not getting it. Your genes don't know who has your genes. It's just behavior based.)
Ok to do your cousin? definitely not great...atom_mOctober 7 2005, 19:48:19 UTC
Basically Zev captured the argument when she basically said don't pass on any "crappy" recessive genes.
This concept is called the coefficient of inbreeding, and while it is lower with cousins than with parent/child, it is still not good. Basically cousins share about 1/8th of there genes. If cousins share the same gene and its a "crappy" recessive gene, and the cousins get it on, there is a good chance (25%) of passing both genes on to their kid, then badness happens. In the end what it all means that there are added risks of inheriting crappy genes if you mate with your relatives, even cousins. Every couple has about a 3% chance of "badness" happening, and the cousin mating scheme above adds another 3% on top of that. So you get a double dose of "badness".
I guess you can say that this is an acceptable level of chance of the kid being okay, that is up to you, but double "badness" seems not great to me.
Re: Ok to do your cousin? definitely not great...
anonymous
October 8 2005, 06:14:30 UTC
Also, your math is way off.
Yes, if both cousins have the same crappy gene, there is a 25% chance of the offspring getting one from each parent. But the chances of both cousins having the same crappy recessive gene is considerably lower, You have to multiply the chance that either of them have the gene to begin with by 1/8 X 1/8 X 1/4.
double, double is right, math OKatom_mOctober 8 2005, 18:22:52 UTC
The coefficient of inbreeding for first cousins is 1/16. That's a 6% chance that any gene will be identical by decent.
Google it. People do this stuff all the time looking at breeding animals and what happened to inbred families such as the royal family of Britain; its well worked out.
Re: Ok to do your cousin? definitely not great...spider88October 8 2005, 07:28:42 UTC
Ah, crappity, my math was off, too.
First cousins share grandparents. If one grandparent had a deleterious recessive gene, the cousins each have a 1/4 chance of having that gene. If the cousins marry, the chances of their offspring being homozygous recessive is 1/16.
So the chances of cousins having a wigged out kid is 1/6 multiplied by the chance of a grandparent having the gene to begin with (depends on the trait, the population, etc).
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Thank you. :)
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This concept is called the coefficient of inbreeding, and while it is lower with cousins than with parent/child, it is still not good. Basically cousins share about 1/8th of there genes. If cousins share the same gene and its a "crappy" recessive gene, and the cousins get it on, there is a good chance (25%) of passing both genes on to their kid, then badness happens.
In the end what it all means that there are added risks of inheriting crappy genes if you mate with your relatives, even cousins.
Every couple has about a 3% chance of "badness" happening, and the cousin mating scheme above adds another 3% on top of that. So you get a double dose of "badness".
I guess you can say that this is an acceptable level of chance of the kid being okay, that is up to you, but double "badness" seems not great to me.
Reply
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Yes, if both cousins have the same crappy gene, there is a 25% chance of the offspring getting one from each parent. But the chances of both cousins having the same crappy recessive gene is considerably lower, You have to multiply the chance that either of them have the gene to begin with by 1/8 X 1/8 X 1/4.
Reply
Google it. People do this stuff all the time looking at breeding animals and what happened to inbred families such as the royal family of Britain; its well worked out.
Reply
First cousins share grandparents. If one grandparent had a deleterious recessive gene, the cousins each have a 1/4 chance of having that gene. If the cousins marry, the chances of their offspring being homozygous recessive is 1/16.
So the chances of cousins having a wigged out kid is 1/6 multiplied by the chance of a grandparent having the gene to begin with (depends on the trait, the population, etc).
Reply
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