R2-45 is not a fun thing, and it's better to stay far away from it. It's something dangerous that people can do to other people, and it's not nice at all.
Imagine you have a toy, and somebody takes it away from you without asking. It makes you very unhappy and upset, right? That's what R2-45 does, but it's a lot worse than just taking a toy away. Instead of taking a toy, it hurts someone's body and mind.
R2-45 is a way of hurting somebody so much that they might not want to live anymore. The people who do it think it's a way to punish somebody or get them to do what they want, but it's not a good thing to do.
So, to keep it simple, don't do R2-45 or anything else that hurts people, because hurting someone is not a nice thing to do.