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I think it’s great. I too had a relationship with my sister that was more than just emotional. Go free. Phil, London

Having worked with social services, I know of young people who have “experimented” in this manner and it never turns out to be so lovely a tale. William, New Orleans

It all sounds so harmless, and we’re so eager to condone what “feels good”. But is it really so different from someone saying that sex with their father is fine because they didn’t feel guilty and felt turned on. Even if they were 14 and he 40 at the time? Even if they were 16 and “consented”? Laura, Winchester

Incest is perceived as wrong because of potential genetic deficiencies, which kicks in the need for survival of the species. I personally find little fault in consensual family sexuality besides the unfortunate reaction and emotional scarring from outside the relationship. It is not “sick”. Julie, Portland, US

Lord Byron and his sister

From the heights which might have made him happy as the husband of a noble woman, he fell into the depths of a secret adulterous intrigue with a blood relation

• Lord and Lady Byron

• Leader: Lord Byron

I used to have sex with my brother

I'm not allowed to be in love with Daniel, but I have good memories of our relationship and don't feel guilty

BACKGROUND

• I hoped bulimia would make me beautiful

• Family secrets: the grief for my illicit love

• I wish I had married for money, not love

• My mother hated all women

Great article. Very honest. I wouldn’t call it “progressive”, but, it does show you a different side of this issue and knowing the other side is always a positive thing. Liz, Dallas, Texas

Everyone sexually experiments in their life, usually first with themselves — so what if she and her brother did it? It was consensual and there was no harm in it. Good for her for sharing her story. Samantha, Hawaii

Interesting. I now think sibling incest may be more common than society realises. Ethically speaking, I do not see a problem provided there is an equal distribution of power (as in this case). Incest is widely evident in nature, so I think it is misguided to categorise it as unnatural. Good article. Noelle, Washington, DC

The most impressive part of this is when the guy says that if she were to say something then he wouldn’t marry Alison. I admire this sincere emotion. Who cares about morality as long as people care about each other and are happy? Zhang Yu, Nanjing, China

I love how so many people are being supportive of this woman. So I have a question for them — if you found out that your brother was having sex with your other sister, or if you found out your mother or father was having sex with their sibling, would you be so supportive? Antonia, London

Absolutely amazing how much moral outrage there is against male-female consensual incest (and there should be), but absolutely none against man-to-man sodomy in the interest of “diversity” and “tolerance”. Where’s the “tolerance” for the brother and sister getting it on? Mark, Seattle

Interesting, I’ve never seen such an approach to incest. The relationship that you had with your brother seemed to be healthy, with both of you having responsibility. I wonder how many people actually experience something alike? Kay, Berlin

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