Hmmmm....
"You see, honey, we know it's just a matter of time until the zombie apocalypse comes. It's a matter of being prepared. These knives, they are our preparation. I know if i were to become a zombie, i'd want you to dispatch me with only the best Bussekin has to offer as it would make the process much quicker due to the amazing steel and quality of construction. That would save you a lot of pain and grief, the quicker the better, right? Darling, it's not about me and what i want, it's about you. It's about my love for you and helping you should i ever become zombiefied. It would break my heart if i were to eat your brains after turning, so i must buy these knives so you can defend yourself from the hoard in my absence. See how much i love and want to protect you??"
That should work, right?