Why is it cool to be bi? Well, I know for a fact that Bi girls can go around feeling up and looking at women in ways which would get a straight man slapped or punched

Seriously... I think some of the so called bi's are bi curious and, in many cases, possibly doing what many men do and lying about thier conquests to get more attention. Bi is a difficult one to call as it encompasses so many 'inbetween states' in the same way as 'switch' does and so the definitions we use get confused. As stated earlier, you can break the definition of 'Bi' into so many sub groupings, possibly ad infinitum.

I am not bi. I have kissed a man and seen a man's genitals close up. These may be construed as 'homosexual activities' by some therefore making me 'bi'. However, I know that I had absolutely no sexual feelings during either encounter. I will do bi things as part of a scene if commanded to do so (in fact, the Mistress I occasionally physically session with has intimated that this may happen soon) but I will not get any sexual feelings from it.

As for the Ancient Greeks... that is an interesting cultural thing and something we lost because the Romans were able to stamp Christian morals over the entire world. Their attitudes to women were somewhat brutal, however... seeing them as useful for nothing other than procreation. What interests me about this is that one of our closest animal relatives, the Bonobo Chimpanzee, has a social structure based almost entirely on sex. Bonobos of both genders have sex with each other a lot, often as a form of greeting ritual (imagine that, in an interview or business meeting... 'Hello Mr Smith, pleased to meet you. Just give me a second to get my trousers off and we can say hello properly' ). Dogs (and I think wolves as well) use sex as a domination thing - the alpha male mounts the lesser males in the pack to demonstrate his dominance and some behaviourists suggest this as a means to show a dog that you are in charge, by standing behind them and holding your groin to their behind).