What should we do about the lusts and desires of our physical body?...

We should not gratify our sinful nature.

The Christian personality is not to be governed by the sinful nature. The Christian personality is to be governed by the Spirit of God who is dwelling eternally in the Christian. Either the lusts of the body or the holiness of the Spirit will dominate us. It is the responsibility of each saint to decide what power will direct his actions, words, and thoughts.