I would like to propose a small gedankenexperiment...
Suppose a gentleman were to return home from work unexpectedly one day to find his wife in the arms of another woman. No, not the arms, exactly. Let us say the wife is presenting to her lover in the ventro-dorsal position. The Other Woman is preparing to to employ a somewhat intimidatingly large strapon dildo, and is about to get down to brass tacks, but no penetration has yet taken place.
Let us further postulate that the Other Woman's affect -- tattoos, perhaps, or a beer gut, or a patch-laden leather vest unremoved from her person -- suggest that she may have some involvement with motorcycle culture. Or, hell -- let's say the strapon is embossed with the logo of the Harley-Davidson corporation.
Then let us further hypothesize that the gentleman, perhaps understandably enraged at the sight, pulls from a hidden shoulder-holster a revolver, which he points at the interloper's head as he demands that she desist from this activity or she will find herself headless.
Can it be said, then, that the man has threatened to waste vagina-mountin' mama?
These and other, similar thoughts occupy the mind these days....