He says weird combination, but they're actually perfect for each other. Just goes to show how much outsiders know. The uke definitely allowed it to get that far in hopes that the seme would jump in.
He hints at it ("I was planning to teach you from the beginning", "he was never a commodity") a few times and at the end he says that he loves the uke... but I still feel that he's too hard on the uke.
I don't think Taehan is rejecting the idea of kids or marriage, but the idea was finally put in his face after this scare. They're both careless and it probably dawned on him that if Dojun was pregnant, they wouldn't be ready.
Boring and the ending was rushed to hell