What are your thoughts and feelings on brother and sister ballbusting?

On a recent post I saw some active discussion on this topic so I thought maybe we could make a separate post for this?

What are your thoughts on this?

If you're a guy and have a sister that busted your balls, how did you feel? Was it different from other girls that your sister did it?

If you're a girl with a brother and you kicked his balls, how do you feel about it? Did your view on your brother change? Maybe it gave you a new feeling of power?