confused HELP

So i have 5.fem purple Kush auto only
And they say a fem could have female seeds how do i make it have seeds without a male and will the seeds of the female seeds be good and when a Hermie pollinate does it do it by itself ?
And why are regular seeds good ?

Without a male it would take one of your plants turning hermie. If the huevos on the hermie are allowed to stay and mature on the plant he will indeed pollinate without your help. Regular seeds are cheaper but odds are 50% will be male. But easier to get your male by choosing the hardiest.