Oops, it slipped?
Talk about your bad faith argument.
What if it’s not “oops, I slightly slipped it in?” What if it’s more forceful? What if it’s a larger body part than a finger?
There’s got to be a line, right? A definition that is describable? “Sticking something into another person’s genitals” seems like a fairly reasonable and understandable boundary to describe a criminal action, and it seems that the law in this case agrees.
I’m happy to let the judge decide on sentencing whether the difference between “a slight finger slip” and “a slight [non-body-object] slip” is meaningful.