Pain can be used for Pleasure. Pain is a synonym of Grief. Grief is a synonym of Suffering. 
Lightning is a type of Electricity. Computer requires Electricity. Processor is part of Computer. 
Pleasure <--UsedFor-- Pain <--Synonym--> Grief <--Synonym--> Suffering 
Lightning --IsA--> Electricity <--HasPrerequisite-- Computer <--PartOf-- Processor 