No but seriously??? Shuraka wants to have sex, Tei also does. How is lube and stretching not the most obvious solution? What is so complicated about that? I honestly fail to understand what the problem is. Or is pregnancy the issue cause only pregnancy can cure the blood? Well then Shuraka needs to get someone pregnant. Sure, this will make it a terrible BL but if not he dies? And that's better how? At least he was faithful... But for me that would suck all the same. So I'm kinda not liking the premise and the lore of this story. But I suppose the author will come up with mpreg solution since we are in the SmyrnaCaprie universe.
First of all, Tei already asked Shuraka in the previous chapter if there was oil, so it’s not like they ignored preparation. And they weren’t in a palace and they were literally in a tent. Where exactly would they casually find oil? This isn’t a modern universe with lube available everywhere.
And the bigger issue isn’t even the sex part. The story clearly stated that if Shuraka doesn’t have children, he will die. That’s the actual stake.

Empty drama unfortunately