Well yes, by your interpretation of the definition NFP or, for that matter choosing not to exercise conjugal rights for any reason could be considered contraception. Looks like you're trying to trying to define onanism so broadly that almost anyone could be said to be practicing it, and so it really shouldn't be considered as sin.
And again I point out that I am using the definition that you posted.
Looks like you're trying to trying to define onanism so broadly that almost anyone could be said to be practicing it, and so it really shouldn't be considered as sin.
Clearly that is not the case here. I am merely questioning why you would post a definition of something and then attempt to disregard it.