Even for wanking off.

That's why I revert to the rather naive notion that consent cannot be about telepathic clones. It cannot depend upon identical participants and a complete understanding of the other's thought.

It must be based on manifest communication with a wee bit of healthy paranoia about the possibility of self-deception on the part of the other. ( But not so much paranoia that their true inner desire could NEVER be expressed with another. )

In short, being a SNAG ( sensitive-new-age-guy ) instead of a egomaniac ought to be sufficient.

H*LL. Given what we now know about actions arising out of choices in the subconscious before we ever "choose" them with our rational minds; even masturbation might violate the perfectionist notion of consent.

Dante