I had a few non penetration experiences with a younger sister and they were positive. We have never spoken about them when we met and our relationship was not affected. The subject should be discussed more and as long as pregnancy is not involved or sex with underage children then there should be no problem as long as it is consensual. It is in Germany Sweden and the Netherlands

I'm so glad you're keeping this thread alive. The topic is so often clouded in embarrassment and ignorance, but it is also fully human and needs greater understanding especially by people who haven't given it much thought. Thanks for bringing this often shadowy subject out into the light where we all can learn of its aspects and consequences -- both the favorable and the sometimes unfavorable.

I have had an on again off again relationship with my sister. I thought it was over based on the fact that she seemed to avoid talking about it but all of that changed last weekend. I felt as if the subject made her uncomfortable so I dropped it. She called me Friday night to tell me that her husband was out of town for the weekend and that she need some company and to get our of the house. We decided to meet at a club. We sat in a booth and got a couple of drinks. We have always been able to talk and the time flys. All of a sudden I realized that she had her hand on my leg. I was surprised but I did not want to over react. We had several drinks and I told her that I did not think I should drive home. We decided to share a cab. Since she lived close to the club we were going to drop her off first. We got to her house and she said that I should sleep at her house because the cab ride to my house would be expensive and she didn't like an empty house. We sat at the kitchen and she opened a bottle of wine. Half way through the bottle I was more than a little buzzed. She said that talking about our relationship made her feel uncomfortable but she paused and then said and really excited. I explained that I did not want her to feel uncomfortable. She said she got over that and leaned over and kissed me and not the kind of kiss people usually think about when they talk about brother and sister. Needless to say the entire evening was a big surprise.

 If All Men Were Brothers, Would You Want One to Marry Your Sister? by Theodore Sturgeon. Originally appeared in Harlan Ellison's "Dangerous Visions" anthology (which is still in print!).  

A snippet of dialog from the story:


"Tell me, then: what's wrong with incest?"
     "You breed too close, you get faulty offspring. Idiots and dead babies without heads and all that."
     "I knew it!...Isn't is wonderful? From the rocky depths of a Stone Age culture... all the way out to the computer technocracies...- you ask that question and you get that answer. It's something everybody just knows. You don't have to look at the evidence....
     "Sex is a pretty popular topic on most worlds. Almost every aspect of it that is ever mentioned has almost nothing to do with procreation.... But mention incest, and the response always deals with offspring. Always! To consider and discuss a pleasure or love relationship between blood relatives, you've apparently got to make some sort of special mental effort that nobody, anywhere, seems able to do easily- some not at all."
     "I admit I never made it. But then- what is wrong with incest, with or without pregnancy?"
     "Aside from moral considerations, you mean. The moral consideration is that it's a horrifying thought, and it's a horrifying thought because it always has been. Biologically speaking, I'd say there's nothing wrong with it. Nothing. I'd go even further..."


Also, the movie "Lone Star" is worth seeing for a sensible response to an incestuous relationship.

I had sex with two teen Uncles when I was a kid. I liked it until my parents found out, then all hell broke loose