Duty: if done with ur wife.
Art: if done with ur love.
Education: if done with a virgin.
Tuition: if done with ur teacher.
Job: if done with your boss/secretary.
Science: if done with a fertile lady.
Business: if done with a prostitute.
Social Work: if done with ur neighbour.
Charity: if done with a widow.
Sacrifice: if done with ur own hand.