As you might remember, Dave really gets stimulated when things are happening around him. Here you can see a picture of Dave when he recently had some unexpected visitors. Dave really enjoys unexpected visitors, which, as you might also remember, is most of the time that he has visitors. One thing Dave does when he has visitors is put his detective cap on. We're speaking figuratively here, because Dave doesn't have any caps, but he figuratively puts his detective cap on and investigates who the visitor is, why they have entered his home, and what, if any, danger they present. Being a good defender of the home requires constant vigilance if you ask Dave. That's why he investigates every visitor thoroughly. He even used to include an investigation of whether visitors had brought any food, but he has sadly learned that visitors rarely bring him food, so he doesn't investigate this any more. After all, he doesn't want to get his hopes up.