> [...] spraying a tank of whipped cream into her mouth.

Because the original mentioned a 'tank' not a 'can', I assumed that original comment meant a restaurant grade whipped cream dispenser like eg https://www.amazon.sg/Otis-Classic-Stainless-Whipped-Dispens...

If you are fancy enough to use such a tank instead of a spray can, you would most likely load it with real cream, not sweetened vegetable oil.

(I don't know how likely sweetening of the cream in the tank is.)