Absolutely Dr Viking - except that I limit my agreement to the financial aspect you quote.
However I wouldn't be seeking a new partner because she didn't want to fellate me 'to completion', to use the euphemism describing CIM.
Everyone has the right not to partake in any form of sexual activity - man on woman, or woman on man, and I would deprecate any pressure on either to conform. As for the use of products solely to take away, or mask, the (alleged bad) taste of semen, or vaginal/vulval lubrication - well thats a non starter for me anyway.
mima57 quotes the article about this product as saying that there is evidence that oral sex (mysteriously with a defined frequency of once a week - why?) lowers stress. Well of course it does - any loving act, provided it gives a complete orgasm, will reduce stress in both individuals -and by a darned sight more than 40%. It should be noted though that this 'loving act' - if it is unwillingly or reluctantly participated in - will increase stress far more than that!
As for more natural masque's associated with diet. Well I've never had a complaint about my quite catholic diet - I eat anything I fancy - and in reality I feel its the texture of semen that deters those ladies who don't care to partake, the most.
Frankly, the best way I have found, over my (very) many years, to bring about this delightful happening is to talk about it without any pressure - about ways where the lady can be in control of what or how much she takes into her mouth and what she does with it. Deep throat is surely a No No for a pleasurable encounter.
So, it's man on his back, woman over him - she determines the degree of oral penetration and at orgasm, what she receives. Semen can be blocked to remain at the front of the mouth, where it is diluted (and the taste and texture changed) by saliva - or even obstructed to be ejaculated on closed lips.
BUT, there is the overriding absence of pressure. If it's been properly discussed and the moment is right, few are the loving partners who won't explore their own limits without it even being suggested. OK, maybe to still reject what we are discussing - maybe to find it is quite delightful!