So I am going down on my BF, trying to give him a BJ, but when I take him in my mouth I can only go for a few seconds before I have to take him out because it feels like I can't breathe. Any tips? Could it be psychological, since I don't want him to cum in my mouth? Not sure because he goes down on me constantly and always gives me orgasms while I can't seem to return the favor with a BJ. Any help would be great.