Emotion is seperate from higher concious thought. They occur in different parts of the brain.

 Your neocortex is responsible for intellectual thought. "lower" animals do not have such a developed neocortex as we do. Thats why they cant drive cars, do complicated math (animals can do some math) or read novels.

Deeper down is the part of the brain that processes such things as emotion. We share this with all mammals. Reptiles and birds have not developed this too much. (though they still understand suffering as well as you)
Finally we reach the reptilian core. This part of the brain controls basic instinct. Sex and aggresion. We share this reptilian core with birds.

Do some research. Read a fucking book. Think about what youre doing. You will pay for your actions later on. Once your clogged arteries and cancerous insides collapse and your soul is free..imagine the guilt you will live with for all eternity due to your laziness and ignorance..