I enjoy giving my boyfriend blowjobs. The thing is he has a big penis. I want to deep throat it and I can except i gag whenever I do it. This makes me stop and catch my breath. He thinks I don't like giving him head because of this. How can I deep throat it without gagging?
you probably cannot. The gag reflex can't be adjusted like a brassier strap. Why don't you get a boyfriend with a smaller dick? Or, why don't you drive him nuts by feathering his dick head with your tongue and then sucking only it. If you enjoy giving head, as you say, why suffer gagging. Just blow him. Surely he will appreciate it. If not, fuck him.
If you want to be a pro you have to manage to stick your tongue out and lick his balls a bit while deep throating.