Do you find wearing a mask improves the outcome of your session?

Does wearing a mask improve your introspection, ability to k-hole, or some other aspect of your ketamine therapy session as opposed to not wearing a mask? If so, how?

I'm especially interested in hearing opinions from people who have tried both using a mask and not using a mask during their sessions so they can truly compare options, but don't let that stop you from responding if you only have tried it one way!