It was probably more disturbing when they saw where the 'mayo' came from..

Forget the part about doing it front of a customer, the real question is why lick up mayonnaise?

Not sure how the health laws in Canada are, but I'd assume they're similar to the U.S. If you had done that here, you'd have been fired on the spot. I hope, for your sake, that this was a one time event and that your boss took pity on your obvious brainfart moment.

as long as it was tasty :))

Before I even get to the whole point about you licking your fingers, how in the hell can you eat mayo like that?! That's the bigger cause of concern. But for real though I would've talked to your manager and left and wrote on FML on how my sub maker was licking his fingers of mayo and I couldn't eat my sub.

yuck.

Accidents happen. Easy to fall in to bad habits. My question is, when you saw the horror on the customers face, what was your response? Make the dude a new sandwich?

You don't wear gloves?

I sure hope you were wearing gloves and could swap out before touching their sub again

That's just nasty! You're serving other people food. Reminds me of the time I went to my local coffee/sandwich shop and I saw a girl making a sandwich for my mom. She walked outside and touch the doorknob while having gloves on. I know she probably changed them but I asked her to make it over again.