Part of why some people believe that is probably experience with teenage girls, who seem to somewhat frequently go through an "experimental" phase where they ar

Part of why some people believe that is probably experience with teenage girls, who seem to somewhat frequently go through an "experimental" phase where they are lesbian or bi, but then later settle down with a man and stay in a long term (happy) relationship. Admittedly I never heard of a man doing this. Men seem to know they're gay from the start and stick with it, unless they are forced into a hetero "lavender marriage" by social rules. This idea of experimentation seems limited to women. But given that it happens so often, the phenomenon can't be entirely genetic.