Situations where people get caught in the act of dealing with weed in unexpected ways are funny. Like when they are trying to hide it from someone and end up doing really stupid things, like hiding it in their pants and then walking really awkwardly. It's the combination of their panic and the absurdity of the situation that makes it funny.
One important element is the build - up of sexual tension. For example, two characters gradually getting closer and closer physically and emotionally without immediately jumping into the sexual act. Another is the setting. A romantic or alluring setting like a moonlit beach or a luxurious hotel room can enhance the mood.
There was a guy who got involved with weed. He started smoking it with his so - called friends. As a result, he couldn't hold down a job. Every employer fired him because of his unreliable behavior and constant lateness which were all caused by his weed use. His relationship with his family deteriorated as they tried to get him to stop but he wouldn't listen. Eventually, he was all alone, with no job, no real friends, and a broken relationship with his family. It's really a sad story of how weed can destroy someone's life.
Conflict creates tension. It makes the audience wonder what will happen next. For example, in a detective story, the conflict between the detective and the criminal keeps the reader on the edge of their seat.
Well, revenge works as a good story element for several reasons. It gives characters a strong motivation and a clear goal. Also, it builds up anticipation as the audience wonders how the revenge will be carried out and what the consequences will be.