Problem: Continue the following story.

When making a jacket, Jim decided to use leather over cloth as a material because the 
Here's how I want to continue it: cloth was susceptible to damage.

Problem: Continue the following story.

Benjamin received a raise at work before Neil did because 
Here's how I want to continue it: Neil isn't a very hard worker.

Problem: Continue the following story.

Randy was truly and madly in love with Dennis due to 
Here's how I want to continue it:
Dennis being a wonderful lover.