My daughter is always grabing her self

I don't see why this wouldn't be normal? Also, how old is she? If she is in puberty than you should know that children masturbation, in this case, is totally normal. There are a several ways how they explore themselves, one of them is that way. It is perfectly normal, I think that you should know that every kid is masturbation, if you don't see your kid or "catch" it while he or she is masturbation, that doesn't mean that this is not happening. It is totally natural that young people are exploring their bodies, that they want to figure out what they like or what they don't like. It is simple. Don't worry.