Why do some theists lie by saying "i used to be atheist" or "i used to be gay" or "i used to be a satanist"?

atheism has been linked to higher intelligence so unless they some how became dumber or something that's not really logical. i can understand why theists might become atheist because of youthful indoctrination into believing in god. and as for homosexuality the gay gene has been proven. look it up.(but not from any religious site). and as for the satanism thing they probably didn't worship Satan, they just did things there religion forbids before they joined there religion and then simply label it satanism.