I guess I am what you guys call a nosebreather. Let me say up front that I have a good fitting mask. During certification, I was the only one that had trouble doing the mask flood and mask removal. Basically, I had trouble anytime there was water touching my nose. Everytime I would inhale, a small trickle of water would enter my nose and down my throat. I would then swallow it so that I could try to take another breath only to have another trickle and another swallow. I couldn't breathe and had to abort the drill. Exhaling isn't as big of a problem, but I do occasionaly exhale a bit out of my nose causing the seal to break on my mask. I eventually got a little better and had to concentrate really hard to just inhale through my mouth and even have to contort my tongue somehow, but I am still not comfortable. Anyway, to my questions. I was watching a documentary on Navy Seals on Discovery, I think, called BUDS. One of the episodes shows their SCUBA training and pointed out that 1 man was having trouble breathing without his mask and that water was entering his nose and trickling down his throat. They seemed to say that this was a medical problem. Question 1: Is there a known medical problem that could make NOT breathing through the nose difficult? Question 2: Could I wear a nose clip inside my mask to prevent the problem? I would think that the nose clip would not be too strong such that I couldn't still exhale through the nose clip to equalize my mask.