Oral sex can be very interesting, if you are devoted to it. Otherwise it will all be so cool! If you do not just look like a task, but enjoy it really, read below. Being a master does not need any great skill. Remember the advice below and do magic!
1. You can train the throat, but it will take a while until you can put in 'big toys'. Start by inserting your finger inside the throat, to the point that usually provokes you to vomit. Soothe your throat and breathe your nose, hold it for 10 seconds, then pull your thumb back. Do this a few times, and always pull your finger even further.
You will see that the reflection of the vomit will become less and less susceptible. After some tests you will have even easier with his penis.
2. It is good to be released first, maybe once or twice in orgasms. Once you relax you will feel the desire to return the honor to the partner, as he did his job successfully.
3. As for the sperm taste, there is not much to do. The partner may eat certain types of fruits and meats that are said to make the sperm sweeter. Additionally, you can use tasteless lubricants, and when the partner comes, you will make the sperm smoother. Then if you want, you can spit on it, no one judges you.