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Folks, this is my first cultivation experience and this plant is already in flower, and I’d like to know if that little sac with brown hairs is normal?
Welcome to the community and congrats, it’s a girl!
welcome to the community friend and I hope you enjoy it here with us. and like mj said. congrats it’s female. little bulb sacks with hairs most often indicates female and good rule of thumb to go by for home growers
Welcome 
It’s a Girl! Congratulations 
When we talk about hermaphrodites, we are talking about a plant that shows both sexes!! Meaning: a female shows itself with the little bell and the hairs coming out of it… a male produces a closed little bell with a little stem 
and when those little balls open into flower 
that’s when it releases all its potential to pollinate the fleshy buds of the female with its pollen!! Meaning if your plant presents both sexual/reproductive organs in one plant. Then and only then will you have a hermaphrodite. In fact, I’ll give you a piece of info: the seeds that come from a hermaphrodite plant are all female, it has happened to me!! in different indoor rooms… with bulk seeds!! With any type of stress, whether hybrid, light, thermal, or pruning stress!! They usually declare as female and in the 3rd or 4th week of flowering they develop male flowers, and if that flower opens… you have a massive harvest of seeds. Mind you, feminized seeds, you’d guarantee yourself seeds for life…
Kind regards to everyone. Best of luck with your grows