IS PERIOD, A SIN..?
Every woman in this world in between a certain age gap [like ~13 to ~50] will experience this.
1st let us know what is a period... a flow of blood and other material from the lining of the uterus, occurring in non-pregnant women at intervals of about 28 days between puberty and menopause and typically lasting for a few days.
It really helps indirectly in creating new generations. Many people especially these days thinks that its a sin and during this interval of time [ 3 to 5 days] women were untouchable and they cant do household works...
The reason behind these rules is "woman who is suffering from the period will experience some blood loss due to this they may become weaker. and also women during this time were not allowed to do rituals and god-related things because in the olden days' temples were located at higher altitudes like they are on some hills etc... so even then we don't have any special ways like well-organized steps, so they should go up with some difficulty... and even in olden days, people who go to temple only were considered as good people... well mannered...etc... if they even go there in difficulty they will be so tired and weak. that's why they passed a rule that they should go to temples and god-related things. If they even roam inside the house bloodstains may fall on the floor, that's why people then didn't allow them to do so. people then thought if they are at home aside they may feel somewhat rested and peaceful."
people then wanted to help women by caring for them but, days now changed a lot... nowadays many great things were invented such as sanitary pads, cups, napkins... etc... and temples now came down to our altitudes. good roads were there to go.
All we have to know is there is no mistake of ancestors or of the girls. It's in the brains of people who still blindly believe these things.
In some words, indirectly even it is a big mistake satisahagamana also having a reason behind it. People then felt frightened that can a male-dominated society [then... not today] leave a woman who has no husband without teasing her..? Other men [ maybe from her own family, a man from the neighborhood, a man who even doesn't know her, anyone can be it] may don't respect her. They thought wrong... but their intention is to protect her respect. just like Thanos wanted to give food and resources to people in this universe but his thought was wrong he wanted to wipe half of the population for that.