You seem to be of the opinion that sexual intercourse is strictly for procreation is that correct? Then by definition coitus interruptous is a corruption of the act and is therfore sinfull as well. And what if fellatio is performed as a stimulant and not as a complete act unto itself? would it be ok in this case if "formal" intercourse were the end result? Is manual maniplutation also sinful if it ends in ejaculation? I suppose using breasts for "deviant" purposes is really heinous then, eh? I never understood how anything a man and woman could do together is considered unnatural. It seems to come pretty naturally to most of us.
No. Expression of marital love and procreation together are the purpose sexual intercourse. My position is that of the Catholic Church. I recommend you read Humanae Vitae. In addition, while in many ways I am a critic of John Paul II, his writings on the theology of sex are extraordinary.
Then by definition coitus interruptous is a corruption of the act and is therfore sinfull as well.
Yes. Traditionally it has been called Onanism, after a biblical patriarch whom God executed for engaging in it.
And what if fellatio is performed as a stimulant and not as a complete act unto itself? would it be ok in this case if "formal" intercourse were the end result?
I'm not sure.
Is manual maniplutation also sinful if it ends in ejaculation?
Yes, masturbation is sinful.
I suppose using breasts for "deviant" purposes is really heinous then, eh?
I'm not sure what you mean by "deviant purposes."
I never understood how anything a man and woman could do together is considered unnatural. It seems to come pretty naturally to most of us.
Do you consider homosexual sodomy to be unnatural? A lot of homosexuals claim it to come natuarlly to them.
Yes, many Catholics believe this. While I understand their position and believe in the sentiment it means to inspire (e.g. the extremely sacred quality of sex), I do not subscribe to it in every detail.