Cut onions without tears - breathe through the mouth

So, with all the existing onion tips I hope that this one does not already exist. At least I did not find anything while searching.
Many people probably already know him, but I still want to get rid of him:

If I have to cut onions, I breathe only through the mouth, not through the nose and that works great! I do not know where I got this tip from, I think from any cooking show.

Of course, if you have to cut a lot of onions, eventually it will not work anymore, at some point your eyes will start to tears and burn, but if you only have to cut two or three onions, it definitely helps.

I hope the tip is helpful for some.