I think if I tried telling anyone who I know is attracted to both genders that they're gay, it would be pointed out to me (with varying levels of humor by individual) that no, they're bisexual.
If I maintained that they were gay because they do have some attraction to members of the same gender, the level of humor would probably decrease over time.
In other words, while they may -technically- be gay -as a part of- being bisexual, from a general usage and possibly an etiquette standpoint I don't believe it's considered proper to refer to bisexual people as gay.
If I maintained that they were gay because they do have some attraction to members of the same gender, the level of humor would probably decrease over time.
In other words, while they may -technically- be gay -as a part of- being bisexual, from a general usage and possibly an etiquette standpoint I don't believe it's considered proper to refer to bisexual people as gay.