For some people, serial killers are simply more interesting than, say, painters, novelists, or mathematicians.
Perhaps they appeal to everyone's inner rogue--or even inner cannibal.
However, some feel that a recent roguish Groupon deal offering a mouthwatering discount on a tour of Milwaukee's watering holes and neighborhoods, might have gone a touch too far.
For this was a tour of the drinking establishments and streets in which Jeffrey Dahmer picked up his victims. Naturally, the Groupon deal was highly price-sensitive: $25 for a $60 value.
Some might wonder, though, whether it was people-sensitive.