Which acts of foreplay are moral?

Any act is moral if the intention and the moral object are both good, and if the good consequences of the act outweigh any bad consequences. If the intention and consequences are good, then the morality of an act of foreplay will depend on the moral object. Any sexual act which is non-marital, or non-unitive, or non-procreative is intrinsically evil and always gravely immoral, even if used for the purpose of foreplay, due to the deprivation in the moral object of the marital or unitive or procreative meanings. However, acts such as a husband kissing and caressing his wife's breasts, or a wife kissing and embracing her husband passionately, are not sexual acts per se, and so these acts are generally moral and do not need to be unitive and procreative.

In order to be moral, each and every sexual act must be unitive and procreative. Non-unitive or non-procreative sexual acts (i.e. unnatural sexual acts) are intrinsically evil, and do not become moral by being used as a type of foreplay, nor by occurring before, during, or after an act of natural marital relations.