Having a set of massive arms is the goal of most bodybuilders. Most men wouldn't mind having a set of biceps that bulge like mountain peaks when they flex their arms. A little arm training would no doubt add some muscle mass to your upper arms.
Bicep curls with a barbell or dumbbell is the most straightforward exercise for the arms. However, lifters have a tendency to swing their back as they lift the weight up. This is using improper form, and you will more likely injure yourself than gain muscle.
A preacher bench is the best way to execute bicep curls. It places your body in a position where it cannot swing for momentum. Your arms are forced to do all the work. A preacher bench makes it impossible to cheat. Most models come with an adjustable seat, so you can find a height level that is right for you. If you are serious about developing massive arms, then train them with a preacher bench exercise equipment.