Here is how I learned.
Step 1. get picture of juicy
Step 2. light doob
Step 3. cut out head
Step 4. smoke doob
Step 5. find pic of tranny
Step 6. finish doob
Step 7. paste head on tranny
Follow these steps and you should come out with terrible chop:
After a few thousand of these you will be ready for more advanced techniques such as putting dirty f's head on a tranny.