The next update will include something similar to your suggestion. :)
It's not a toggle, but you can choose to forgo food options on dates. Persuading your girl to eat does become harder if you aren't joining her, though!
honestly that’s even better I like that there is consequence, and it also could lead to some interesting dialogue eventually if you wanted to turn the tables on a feeder personality!
eventually you could also add a light, normal, heavy sort of thing too that could lead to cool new interactions depending on characters. but this seems like a little hard to code seems like that may branch things too much but it’d definitely be cool lmao