Would you automatically send the money?

So on average I'm always buying food for the house. I don't drive so I'll do an online shop every once in a while and then I'm buy things here and there. Well now I'm self isolating at home my partner has to do all the shopping, he's actually been buying food we need. Usually he comes back with junk food. Anyway I was going to give him some money upwards the shopping, but then I remembered I always fork out the money myself. I mean I never spend more than I have and I'm assuming he wouldn't either.

Should I just contribute in some way even though he never does?