<p>"There doesn’t seem to be a lot of interest in sexuality research these days (so I don’t have hard data), but it certainly appears to me that most people are somewhere along a spectrum from completely hetero- to completely homo- sexual–and that where a person is on that spectrum can be fairly fluid. "</p>
<p>There is a lot of research being done on sexuality and what has been found is yes, that sexuality can be fluid, that it isn’t as rigid as some may believe. That said, though, there is a problem with statements like that, where the religious right types with their claim that being with a same sex partner is a choice, will point to that and say “see, even scientists are saying anyone can be with anyone, so therefore if gays want to get married, they can marry an opposite sex partner, etc”,and that is trying to take real research and mold it to fit their religious beliefs.</p>
<p>Sexuality is and can be fluid, but the thing is, it depends on the people and also what that fluidity is. There are gay men and women who occasionally have sexual flings with opposite sex partners, yet whom otherwise are pretty much totally gay in orientation (I am using gay for both men and women here, though some tend to use it only for men). There are also issues of emotional bonding and such, where people might be able to enjoy having sex with someone of a different sex (or same sex), but otherwise is drawn to one or the other sex. </p>
<p>Some people can also be fluid, in the sense that they go through life seemingly oriented one way and then at another stage of life, seem to change. </p>
<p>The problem with what the religious claim is that ultimately, most people are oriented mostly one way or the other, and it isn’t a choice, that part is not fluid. Ironically, the same people will agree with you if you say someone doesn’t choose who they fall in love with, but on the other hand will say that if someone is attracted/falls in love with a same sex person, it is ‘choice’ (they also are saying in effect that sexual attraction and love are the same thing, where with anyone you can find someone sexually attractive, happens all the time, but you aren’t attracted to them as a partner/mate…).</p>
<p>Studies do reflect this complexity, but it also has confirmed that the fluidity tends to be rather limited with most people, that only a relatively small group “in the middle of the continuum” is truly able to form relationships with either sex like that. The fluidity, in other words, is bound within a certain range; a straight man or woman might be able to have a same sex fling, for example, but that doesn’t change their basic orientation, whereas some people can swing between same/opposite sex relationships, full relationships, and do so <em>shrug</em>.</p>
<p>Personally, I would hope that someday that whatever people do in their relationships, who they find attractive/sleep with/partner with, etc, is up to them, as long as they aren’t hurting anyone or as they used to say “scaring the horses”, others can give them a smile and say “that’s nice” and base stigma strictly on harm, like someone having sex with a child or coerced sex or the like.</p>