To the post about the husband who kissed his sister

When I was around 8, I kissed my little brother. I have OBVIOUSLY no romantic feelings whatsoever. The thought of it makes me want to vomit. I don't remember much, all I remember is that we were roleplaying on being boyfriend and girlfriend after watching the movie Grease. Normal? I think so. I have heard siblings sometimes experiment with themselves at a very young age and then the thing that aids for you not to be attracted to your family member(forgot how it was called) kicks in and you don't do that kind of stuff anymore.