He wasn't going to let him get under his skin even if he's overcome with desire and unable to come up with good reasons to resist their spontaneous reaction.
Tyberius Rossi-Royal knows when he meets Desmond, he needs to avoid the man who has his off-balance and not acting like himself. There was no way he was going to get involved with anyone…especially this man. He's good with his life as it is and doesn't need the trouble Desmond would bring. Yet he's drawn to this man who pushes all his buttons even if he's not his type. There was something about Desmond that makes him decide to get to know this man who made him react.
Desmond Jarrett already knows that Tyberius would be his. The man just needed to figure it out for himself. When Tyberius comes to him, he's ready to be all in for whatever comes. Desmond doesn't expect that Tyberius would make him off-kilter. Tyberius wasn't what he expected and he enjoys the unexpectedness…of their spontaneous reaction.