I thought about this article of Explainer for a few minutes and then put it in context:

Why would you instruct a public audience how to spot a prostitute except to promote sex tourism?

Why would you instruct a public audience how to spot a prostitute except to undermine the social order?

Why would you instruct a public audience how to spot a prostitute except to discredit a people by exposing their social failures?

Why would you instruct a public audience how to spot and acquire a prostitute in Iran?