Same, I do the same thing. If I need a drink, which I usually do if me and my friend get take out from somewhere and we didn't order drinks, then I will ask permission to get a drink, almost always water, and help myself out with that. I don't mind doing that. Or the other exception is if we got take out food and saved some of it for later and it was in the fridge, then I don't mind getting it out later if we decide we want more food. Or if I am helping her cook and things need to be taken out or put away upon her request. In those instances, I'm okay with it. But I would never invite myself into their fridge though. Too risky.