Thank you for replying . I am going to try some flavored lube once I get some extra money .

I will definitely check that out! Thank you!

I can only answer from my experience and I hope that it will help you out.

How I got more use to giving oral is by taking a shower with my partner before hand and using the unscented body wash ( I use the one for women) then giving oral that way I know it's pretty cleaned up.
What I have found to be the best way to give head is to have cues or words for him to tell you what he likes and what he does't like. I personally love it when a guy is telling me "use your teeth a little more" "I like it when you do that" "I don't care for that" then I know what they like and what they don't like.
Major differences I have found among my partners I have had are the following:
Teeth or no teeth
Deep throat or not
Anything to do with balls ( Sucking/licking, which you might not prefer due to a taste, or massaging)
Playing with the area between the testicle and anus ( perineum)
Sucking on the tip of the penis
Licking/sucking down the shaft

Things that most guys do not like:
Going in one motion, changing it up when they are about to orgasm.

Things most like:
Using hands and mouth at the same time ( Which is a help when your mouth gets super tired)

First of all, the most important thing here is that you don't beat yourself up over it. That's an awful feeling, I know. I have a VERY similar situation. I'm not comfortable doing it because.... I was forced to in the past and it's hard to get past that. It's only "unfair" if that is how YOU see it. Quite frankly, just because he does it for you and you do not do it for him, I don't see that being unfair. You don't give to receive and if you do, that's doing it for the WRONG reasons. Does he perform on you because HE enjoys it as much as you do? If so then why be upset if you don't return the EXACT favor. First, you guys should talk about that particular thing. When he does you a favor, say taking out the garbage, does that mean YOU MUST take out the garbage the very next day or you're terrible and it's unfair? Of course not! You can return the favor in different ways. Don't you guys have intercourse after he's performed oral on you? You have sex (probably) for you and FOR HIM. There you go. Favor returned. If you don't like it, if you're not comfortable with it, there's no reason to HAVE to do it. I understand that most people only believe in giving if they're receiving. We don't and maybe you guys don't either? It sounds like he's a pretty understanding guy? I hope so. There should never be resentment in a relationship about sex and NOBODY SHOULD EVER HAVE to do something just because the other did it for you. No. That is not how love works.

I'm not comfortable with oral because I was forced to do it in the past, like I said. Good thing I found a partner who doesn't NEED or EXPECT it. The great thing is, I never ask for anything. I have never once in five years of being together asked him to give me oral sex. Well, unless he said he wanted me to beg, but that's only for fun. I don't ask for it and I do give him oral sex sometimes. He gives it to me because he loves it as much as I do. I tell him there's no way he could possibly enjoy giving me oral as much as I enjoy receiving it, but he claims he gets the most enjoyment from it. No loss there! If I FELT that I had to always give what I received in a relationship, I wouldn't be in one. What one person likes won't always be what the other likes. There are plenty of ways to return his favor without making yourself do somethign that you don't want to.

What about a hand job?

My partner hasn't ever been able to come via oral sex. I've made my mouth raw (literally) trying to make it happen before and he just doesn't love oral so it works out. Any time I've tried to do it for him and I do like doing a little oral for him, just not continous having sex with my mouth for 30 minutes. I don't do it for that long and there's nothing wrong with that. Anyways, any time I try, he quickly starts wanting sex instead. It just isn't as good as real sex for him.

Now that that's out of the way, you did ask for tips. Here are mine:
Try showering together and washing him yourself and then doing it. That will help you feel more comfortable and have him FULLY pee first! Lol. If you don't like the taste of ANY fluid whether it's come or pee in your mouth, you don't have to endure something like that to please someone. If they can't understand and take what you give, they may not be the one. Not saying you should say screw their needs and always do the taking, but there's no reason you guys shouldn't be able to settle on a nice little agreement. Ya know?

I personally hated that book. I was quite offended by the other Sadie Allison books though so that may be part of the reason I wasn't pleased with this one. I would suggest trying YOUR OWN tricks and not "learning" from a book. That usually ends in a fail anyways. Not everyone will like the same things and it's terribly obvious when you try new things that were learned from books. Best to spend some time playing with your man your own self and thinking up your own ideas.