How particular are you about sharing your daily stuffs at home?

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For me and my family, we like sharing such as our food to drinks, to our plates and utensils and toiletries. Of course when it comes to our personal stuffs like toothbrush and sensitive apparels, we will not share. But I heard from my friend that in her household, everyone has their individual stuffs such as their own plates and utensils and their own towels with labellings on it. So I am quite curious whether do you share your stuffs with anyone at home like me or you prefer having your own stuffs? And are you particular about the person whom you share your stuffs with? Definitely we are not talking about just some strangers. But for example if your mom wants to borrow your perfume or wants a bite of your food? And to what extreme will you go in order to make sure your item are not being shared with? For example, I will personally not be happy if someone takes the last bite of my food. What about you?