Rubbish. Sexuality is not fluid. Consciousness determines behaviour. A distorted, fragmented, unhealthy consciousness creates distorted, fragmented, unhealthy behaviour.
You probably don't understand the term as used. Saying sexuality is fluid merely means people can engage in both heterosexual and homosexual behavior. I often post that homosexual behavior and/or same-sex attraction is the result of confusion, but that doesn't mean sexuality isn't fluid.
To put it another way, some folks will state sexuality is fluid, but they are inconsistent and believe it only flows from heterosexual to homosexual. To them, stating sexuality can also flow from homosexual to heterosexual is to an impossibility, when we see a growing number of former homosexuals every day.