If God invented sex than maybe the advice He has given on the topic is worth reading Love verses Lust Love gives lust takes. Sex is a product of love. When sex is engaged outside the boundaries of love it becomes destructive. The womb is the home to the foetus, the river is the home to the rushing water and marriage is the home to sex. Take any of these things out of their proper place and they will become polluted or destructive.
Marriage is a product of love and commitment.
This is the proper place for sex. How to have sex Sex God's way is a product of love not lust. Remember that lust takes. Indeed many sincere Christians have found themselves married to partners who seem to have an unsatisfying hunger for sex. Some of their sexual demands are also quite frightening.