From my personal past experiences, I have learned that to adjust to taking more depth, you should start by manually stroking while performing oral. Example: moving your mouth over him in tandem with your hand wrapped around his shaft. Not only will it provide him the stimulation of deep throating for him, but it will allow you the ability to gradually take more depth at a pace you are comfortable with. In doing this, I have completely overcome my gag reflex.

As far as the texture and taste, I agree that eating and drinking fruits greatly improves the taste. I have also found that the more fluids he consumes, the better the consistency his spunk is. Meaning, it is much less thick and slimy, so it is more enjoyable and easier to swallow.

Hopefully this will be helpful and you are able to find as much enjoyment in giving as he is in receiving.