Trying to get BJs from my girlfriend

At the beginning of our relationship, she used to give me blowjobs on a regular basis. I didn't even have to ask for one, it seemed to me that it was natural for her to give me a couple minutes long blowjob as part of our foreplay (it was never a sexual intercourse as a whole). After a few months (when it became more certain that our relationship was a serious thing), the blowjobs happened less and less often, to disappear almost completely. We have been together for 3 years now, and I think I got sucked about 30 times all in all, with 10 of them during the first months, and the other 20 during the 3 years, only when we are taking a shower together. In my opinion, being in the shower divides the pleasure by 5 (water is too distracting and skins aren't as soft when wet) but there's no other place to get a blowjob from her, and only after imploring/teasing her for days. Plus, the few last times one looked more like handjobs with a bit of licking bonus.

I asked her why she stopped giving me that delicious pleasure. Substantially, she doesn't like the taste (although we're in the shower so I'm more fresh and clean than one could ever hope), and she told me that she used to give me more blowjobs before because she didn't want me to act picky and leave her because of that (I would never have, but how could she know anyway ?). There are also things that play a role in all this that I didn't have to ask her about. First, she doesn't like being dominated, even in the little things (for example, the only way she can have an orgasm is by riding me, not the other way round), even in simple life (we can have a conflict about what's the best way to wash the dishes). Also, my penis is slightly thicker than average, which certainly doesn't help for sucking it. Third, I do oral sex to her almost every time we had sex, and always until she asks me to stop, not a second before.

I'm okay (sort of) with her not giving me blowjobs. Besides that, she makes love like a goddess and when she's too tired for it she gives awesome handjobs ; sometimes I fuck her tits, I can even ask her to stand like this or sit like that, completely out of the blue, and masturbate on her (proof that what she finds repulsive in blowjob is not my perversity or having cum all over her). Really, I'm happy with all this. But it's like having an awesome cake, you know, but that cake would be so much more awesomelicious with a chocolate topping. Sometimes, at some odd moment of the day, that missing topping comes to my mind and I can't help thinking about it and it keeps wandering in there for days. As you can see, I am very obsessive with it. There is this thing that makes me sad : the thought that I will die without knowing what it feels to come inside someone's mouth at least once in my life (I don't care about swallowing). Sometimes I feel so desperate about this that I could even cry.

There are 2 possible solutions.

1. You can help me find a way to have her do it, even if it implies a slight mental manipulation to initiate the process of her becoming a cocksucker. Please don't tell me too much about morals and manipulating people. I'm the clever one in the couple, she's the stubborn one ; I'm the bad pervert, she's the nice player, so manipulation is definitely my part. Sex is just a game, a little metagaming can't hurt. Anyway it can be something very simple and fair, like stopping giving her oral sex. Nothing devious in doing this. Just... Give your ideas away even if they don't sound nice. I'll decide whether it's ok or not.

2. You can try to talk me out of this... Well it would rather be talk me into accepting an oralless life. But that won't be easy. At all.

3. Trying to input failsafe : asking someone else is NOT an option. She is the only one until one of us dies. Please don't try to tempt me, as this thirst for knowledge of oral experience is the only thing I know that could push me towards doing something wrong. I am very sensitive to sex ; it can turn me all inside out. It would be bad to leave the woman I love because of impulsiveness driven by meat.

(((Proofreading while thinking most people on Reddit are in the USA leads me to adding this : we live in France, and fellatio is little part of our sex culture compared to the USA, so we haven't experienced it much at all (mostly, I believe, because French teens care less about their virginity than US teens do, so they don't use workarounds as much, which is, in my case, a pity). My point is, "blowjob requires less effort than sex" cannot be an argument she would buy at all.)))