my older sister used to hit my balls a lot. she's 2 years older than me. one of the best/worst times was when i was changing so i was naked when she and her friend came up behind me and one of them kicked me. i fell and so my sisters friend held my arms while my sister grabbed my balls tight. she squeezed and twisted for a long time while both of them laughed. i was crying and right before she let go, my sister yanked down on my balls hard. they stepped over me and left. i was on the ground for a long time.