Before taking this step, had you had a mutually satisfying sexual experience with someone of your preferred gender whom you found physically attractive and for whom you cared emotionally?

ie: are you aware of the magnitude of the positive utility which you sacrificed?

Could you be a little more specific? I'm still unsure why you brought this topic up. Are you suggesting that at least some of us could be better rationalists if we did the same?

As far as the effects of testosterone, high levels can interfere with cognition, but AFAIK low levels also have a negative effect on cognition.