Raksha Bandhan is a Hindu festival that celebrates the bond between brother and sister. Traditionally sisters tie a "rakhi" (thread or ornamental bracelet) around the right wrist of their brothers.
Every year a few women associated with shuktara go to the boys' home and tie rakhis on all of the boys and young men - as you can see they are absolutely delighted to participate in this celebration of the bond between siblings.
According to Wikipedia this "transformed tradition" also happens outside the shuktara homes:
"Among women and men who are not blood relatives, there is also a transformed tradition of voluntary kin relations, achieved through the tying of rakhi amulets, which have cut across caste and class lines, and Hindu and Muslim divisions."