I'm working on a story which features an overweight/obese character. I need to give him a knife for a confrontation in the story. As of now, the character is 26 and still lives at home. I thought of making him the target of bullies and the knife is for protection. I thought of putting a serial killer in the town and, again, protection is the angle. I'm not really too in love with any of those. So, any help is appreciated!