Girls, ladies was I wrong for lightly hitting my boyfriend in the balls?

so me and my boyfriend like to prank and mess with eachother and one day i just decided to lightly tap him in the balls but this REALLY hurt him. he was on the ground and in pain for 30 minutes and he's a pretty tough guy too. but now he is mad at me. was I wrong i didn't even hit him that hard how was i supposed to know how bad that would hurt him

Girls, ladies was I wrong for lightly hitting my boyfriend in the balls?
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