When I had to figure out if my friend was a muggle or not I had to figure out if i did different thing than muggles. Trust me we do we act a lot more strange, you will get way more hyper than they do if your a true wizard that is. Muggles(humans) act so much more calm smoke weed daily or weekley or all the time, while wizards do not. They also will always try haveing sexualinercorse unless they are girls. That is how you know if you are muggle or not. I am a wizard that is how i know these things