Each sexual act must be considered separately as to its morality.
These sexual acts are unnatural, and not open to life, and intrinsically disordered, therefore they can never be justified, even if they are not completed with sexual climax, or even if they are completed with sexual climax during natural marital relations, regardless of whether they precede, coincide with, or follow an act of natural marital relations open to life.
If you know that it is stealing, then you know that it is wrong.
The intention to be charitable and loving to one's spouse does not justify achieving sexual climax by any means other than an act of natural marital relations.
He even states that such unnatural sexual acts are even more damnable i.
Unnatural sexual acts are always wrong, even if done with a good intention or purpose.
The sexual climax of both husband and wife are each inherently and directly related to procreation the generation of new life.
But I tell you that half an evil deed does not make for a good deed, not even if you combine that half an evil deed with something good.