Now if someone wants something very unusual or unreasonable, they may never find someone who will satisfy them. But if it is something fairly common like oral, they may be willing to find another relationship where they will get it.
There is absolutely no requirement to satisfy your partner's wishes if you don't want to. But there is no requirement for someone to stay in a relationship if they are not satisfied.
So, if one person really wants oral, and the other person really doesn't want to do it, maybe the relationship shouldn't last.
To me, this changes when you are married (or otherwise committed long term). In that case, you have accepted your partner as they are, and should not go looking elsewhere.
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