Normally I can play footy fine with a mouthguard in, but if I have a cold and my nose is blocked up, which is more often than not in Winter, I can't breath properly with a mouthguard in. I don't really give a stuff anymore. I wore a mouthguard for years and didn't ever get a serious knock to my teeth, then got one punched out by some bogan in town and tripped walking up the steps of my house and cracked another one. I don't wear any mouthguard anymore, and the majority of my teammates are the same. Who needs teeth?