LCS stands for Lack of Common Sense Syndrome.
Someone lacking the intelligence to a high extreme.
"Dude come' on let's cross, the car is right there but we will make it!!" " Yo your going to get hit by that car idiot, your LCS syndrome is kicking in!"
1.. Putting tin foil in the microwave
2.. Having sex with animals
3.. 2+2 obviously = 4