I haven't tried the crotch trick, but I do like to let it sit out for a few minutes so it starts to get a little melty. Then I eat it by licking the melting ice creme from between the two wafers and repeat until there is more wafer than ice creme, then I eat it all. I love ice creme sandwiches. Edit: wait, are we talking about the same thing? bars=sandwiches?
Umm... http://images.ciao.com/iuk/images/products/normal/174/Mars_Midnight_ice_cream_bar__6238174.jpg