That may be your belief, but the majority of Christian witness over the last 2000 years would find that comment appalling.
Let me clarify. I'm not including anything that defiles another one's spirit. I'm talking about what occurs between a husband and a wife.
There is no sex manual in the Bible; and there are FEW things we are told are wrong pertaining to sex within the bounds of marriage. Various ministers/priests may state that one act or another is sinful in marriage, but those acts (specifically oral sex and masturbation) are NOT condemned in the Bible. We have a differing view point because your perspective is from the Roman Catholic Church whereas mine is from the Bible.
The sin comes into the picture when our minds use another person outside of the marriage as a part of the activity (fantasizing about another while making love to the spouse). Also, any act that totally replaces intercourse (ex: completion of the act without intercourse as in oral sex) OR causes one partner or the other to be mentally separated from the other (I would use pornography as an example) OR becomes the only method of pleasure, thereby avoiding God's purpose, would be unacceptable.