I don't think so

I don't know about original sin

for sure a kid have less sins on his/her "karma" and so is purer than an adult


for Plato in Phaedrus loving of children is purest form of love

in Hinduism a marriage with young girl is classified as untarnished love


According to the Kama Sutra the results of marrying a young girl is untarnished love, "When a girl of the same cast, and a virgin, is married in accordance with the precepts of the Holy Writ (Darma Shastras), the results of such a union are. untarnished love."
http://cryingsparrow.blogspot.it/2008/05/child-marriage-in-ancient-india.html