Are inner ear earphones comfortable? and do they stay in your ears?

I do not like them. They stay in my ears fine, but I get the same feeling as when you're on an airplane before your ears pop or when you have a really bad cold with fluid in the ears. I feel like there's pressure in there and I REALLY hate it that I can hear all my own breathing and swallowing. To me, that was more bothersome than any outside noises that might make it in. Also, outside sounds are blocked too well in my opinion.