I think that I am a motorcyclist or a biker based on my wife's assessment of threat level for a given situation. For example: If she is enjoying herself at a party, and converses with someone who mentions a motorcycle, she might reply: "Oh, my husband is a motorcyclist as well. I'm sure you would both get along." If she is walking through the park and encounters someone who looks scary or makes a move toward her, she might say: "Hey A-hole, my husband is a biker. You better watch yourself."