A follow up to: Enjoying giving blowjobs. spit or swallow?

As in the poll, 'Do girls really enjoy giving blowjobs?', I replied, yes. I wouldn't say that I luv the way my boyfriends cum tastes, but I don't mind the flavor it has. I do not like the way his sperm smells, it's acrid, bleachy smelling, and when he cums in my mouth, it sometimes feels like its going up my nose. It actually has gone up my nose when he's cum in my mouth, because I have problems with swallowing it all. Between the way it smells, and if it hits the back of my throat, I gag and can't swallow. I feel bad when I can't swallow his load and have to either let it dribble out of my mouth, or spit:( I'm curious if other girls have the same problem? Is there anything that he can do about the taste, feel, and smell of his load of cum? What is the proper etiquette?