Why do some people slam everything all the time?

When I was in my home country (Malaysia), I used to live with at least 3 roommates (different apartments) and I am sure I am not just being sensitive. They slammed almost everything. The house door, cabinet, windows, refrigerator door, toilet seat, microwave, you name it. Now that I live in the US, I notice my husband’s uncle is the same way. Whenever he comes to our place, I could tell it is him without seeing his face from the unnecessary noise that he makes.

Why do some people slam everything all the time?
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