When I was younger I stayed with a friend of mine at his house while his mom was away in Germany for 3 weeks. He would smoke weed in the bathroom with the door

When I was younger I stayed with a friend of mine at his house while his mom was away in Germany for 3 weeks. He would smoke weed in the bathroom with the door closed and the fan on. Eventually the dogs started sniffing under the door every time he went to the bathroom. Even when his mom came back if anyone went to use the bathroom they would run to the door and start sniffing. Now i'm not going to say that it's hard hitting science but it's enough to convince me.