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Quite right,
A number Catholic priests and theologians have been teaching certain ideas on sexual ethics within marriage which are irreconcilable with Catholic moral doctrine. This set of errors can be divided into four erroneous concepts:
A. They teach that unnatural sexual acts are moral when used as ‘foreplay’ or ‘stimulation’ prior to a completed act of natural marital relations. The very same sexual acts which they admit are intrinsically evil are then said to be moral, if done partially, and if followed by natural marital relations.
B. They define the sexual act in terms of its completion, so that any means to that end becomes justified. As long as the completion of the act occurs in natural marital relations, they claim that even an unnatural sexual act is justified by that end. The unnatural means is then renamed as ‘foreplay’ or ‘stimulation,’ so that the end not only justifies the means, but also seemingly redefines it.
C. They teach that a set of sexual acts, partial or completed, natural or unnatural, can be considered together, as if these constituted one act, thus nullifying the doctrine that “each and every marital act must of necessity retain its intrinsic relationship to the procreation of human life.” (Humanae Vitae, n. 11).
D. They claim that the woman’s experience of sexual climax is not related to procreation, and so it can be sought and achieved by means other than natural marital relations, as long as it is ‘within the context of a completed act of intercourse.’
This set of errors is being taught very widely, and seems to be the majority opinion among moral theologians. Even some priests are teaching that married persons can commit unnatural sexual acts without sin. Among those theologians, priests, and lay teachers who assert such errors, the many present these ideas as if they were patently true assertions, or as if they were the teaching of the Church, with no accompanying theological argument, and with no indication that any other conclusion is possible. These errors represent a danger to the sanctity of the Sacrament of Marriage because they encourage married persons to commit objective mortal sexual sins alongside the act of natural marital relations, which is an essential part of the Sacrament.
Read
catechism.cc/articles/marriage-bed.htm#05