Sandy is right, that is the reason for clipping ear hairs. Cockers are particularly prone as they have long leathers covering the ear canal. Small scissors are best for a youngster, you can get them with rounded and curved blades so they don't injure the skin. I wouldn't use anything electrical on him as you might scare him. Once would be enough for you not to get near his ears again. At this age poodles are very sensitive. I have a friend with Champion poodles, who has her own grooming business, I will ask her.