Well that's why it works so easily on them, its a natural urge. But they need to be sold the idea of giving in completely to it, else even the minorest of parenting and social cues will curb a lot of it.

The same way guys have a lot of urges towards violence and sexual forwardness, but only the niggerest and other browns were convinced to simply not hold back on their every hedonistic stray thought. Mixed with some genetic predisposition on that one.