1. You should not marry someone if you haven’t determined that you’re sexually compatible, if sex is important to you. When you marry someone, you’re marrying the whole person, including the kind of lover they are. If the sex is still subpar after you’ve been having it for a while, it’s probably not going to improve - so weigh that in your decision-making process when trying to determine whether or not you really want to marry this person.
2. If something is wrong with your sex life, the problem is probably a lack of communication. Don’t post on the internet asking strangers for help if the best source for answers is lying in bed next to you. Your partner knows what they want and what they like way better than any Redditor does.
3. There are a lot of people who want more oral sex and are not getting it (some want to give, some want to receive, some want both). One of the best ways to make this happen is to ask your partner, “What specific things can I do to make you want oral sex more?” and then do what they tell you, even if it seems a bit weird or unnecessary.