I am flat out bi-sexual and have been for as long as I have been sexual. I can tell you, in my experience, that there is a stigma attached to bi-sexual people that we "will do anyone." So not true. I honestly believe that I am pickier when it comes to partners than a "straight" person is, but that could just be my personality, too. I have found the same stigma is attached to people identified as gay or lesbian. I believe it is a social stigma that is coming from the dis-ease of the general straight population, perhaps even linked to religious or moral upbringing, in thinking that people with other sexual identities are "not normal," and therefore must be willing to have sex with anyone.