How do you accidentally touch a girls butt so you don't get caught?

While your passing her swing your hand up and on the way down lightly touch it. If she asks you about it say it was an accident or that you didn't know that you did it and say sorry. If you have told a girl it was an accident don't do it again to that same girl!

Just brush it as you're walking past when she's facing the other way (most likely she won't really notice). Even better stand in a narrow space and face the other way, touching her butt as she walks past, this way she can never blame you. I have tried these several times and no girl's ever mentioned it.

Another way is if a girl is walking in a line with her friends (which takes up the width of the corridor) brush her butt as you walk past she'll think it was an accident as there wasn't much room.