I had a customer like that as well. Very attractive, polite, & sweet male. He was one of my favorites. Over time, he started to seem pretty out of it. His whole demeanor changed. He started coming in with his father who was purchasing stuff for him. You could see the sadness and disappointment in his father’s eyes.
Overall, he still looks the same as of now. He just went from being kind to this disrespectful asshole that you dread seeing walk through the door. The way he moves is abnormal, he’ll pick up the product and then aggressively throw it down. I watched my mom fall into drug abuse, so I have a pretty good idea as to how it changes a person mentally.