I know some Ulama dispute about this. There is no clear hadith or ayat which states that this act is impermissible. So some say it's haram while some say it is not.
What is my belief? In my opinion, I don't think it's haram for two reasons. Firstly, I am of the firm belief that whatever is not stated to be haram is halal. Halal until proven haram. So I don't think anyone has the right to say that it is haram tbh. Secondly, Allah always makes things clear for us, to the extent that he told us very clearly that anal sex is haram. Ask yourself, why would he bother saying anal sex is haram and then not say anything about oral sex. It's only logical to believe that it is not a haram act.
And tbh, I think those that say it is haram are being very hipocritical. They have no basis to claim that it is haram yet they say it just because they find it disgusting. It's ok if you find it disgusting but that can't be a sole argument for claiming it is haram. Yet these same scholars permit things that are very clearly haram, like did you know taking pictures even just for passport is haram. Yet these scholars say that in these circumstances it is permissible.
yet for an act that it is nowhere mentioned to be haram they want to say it is haram.
What do you guys think? And would you engage in oral sex if your partner wanted you to?