My classmates always borrow razors from me. What should I do?

1. My roommate borrowed your razor, and he didn't know he couldn't borrow it. Once the razor cuts the skin, it will be contagious. Make it clear to my roommate that he won't borrow it again.

They are all in the same dormitory. It is normal to borrow a mobile phone and a stationery. Never borrow personal hygiene products. This is the principle and the bottom line.

3, everyone has their own bottom line, guard well, don't violate others' bottom line.