Where does bagseed come from if our buds were off females?

As the title states: Where do bagseeds come from? I thought the bud we buy are from females, why are there seeds?

Sorry for the noob question

Because people are carless and don't weed out the males early enough if at all and they females produce seeds. Or some females turned hermie because they were grown horribly or they had awkward genetics.

Hence...seeds.

if you buy a bag and its loaded with beans like every bud then it was probly grown outdoors and the males were not culled.
if its only a couple of beans in just a few buds not all buds then it was probly a hermie or a male caught late.