How curious is bi curious?

Very curious!! lol sorry. No, bicuriousness can range from thinking or fantasizing to doing something with another person of the same gender. Generally if its enjoyable at that stage someone will adopt the term bisexual. If not then they would be straight with bisexual tendencies. See also the Kinsey Scale. http://www.kinseyinstitute.org/research/ak-hhscale.html