oiling mods for dummies

Yeah, like "whats that plug doing,laying in the oilpan", or "I wonder where that came from",or I wonder where that goes", or "who left that plug out",or "is that a broken drill-bit in there?" or "are those bearings in upside down?",or "I thought there was supposed to be 5 bearings on the cam?",or "is that modified? that cant be right. Who would do a thing like that?idiots.", ETC