When you visit someone's home and tells you ""mi casa, su casa"" or ""feel at home"", is it okay to eat any food on the fridge and walk around half naked like you normally do at our home?

"It just means to stop asking for stupid permissions like "can I have a glass of water?" or "Can I go to the bathroom?". No they're not telling you that you actually own part of the house and can do as if you were alone. "