If you were (or are) a parent, how would you try to teach your child not to get involved with people who want to have sex with them for money or financial assistance, rather than love, without alienating them?

What would you say to your child, kid or adult, so that they would understand how not to get involved with someone who would use them for financial gain, or other reasons that involved taking things from your child, rather than being in love with them, or caring for them?