John, can you explain why would an evil spirit need to enter a lingam or a yoni? and this can only happen practicing yoga? you were ill after (1) yoga session and this is what you come up with? in addition to a not so great looking teacher?
even to humor this would admit that these entities would have alternate opportunities with non yoga practicioners as they bend over to tie there shoes, bathe sit on the toilet, have sex, spank the monkey. Does anyone here not spank the monkey? or sit on the toilet?