Imagine while techno and dream on a date until a random stranger talking to dream like flirting while dream just listening too oblivious and innocent to understand what the stranger said.
So whaat will techno do?
Hah! Techno seems very scary and looks like he'd beat you up but in reality he'd just shyly approach and go "aha.. he's taken." And walk away with Dream in tow, maybe a scowl on his face but he won't mention it again unless he has too.
If it came down to someone getting too touchy Techno would definitely get a bit more angry rather than just.. not caring and removing himself and Dream from the situation! Techno isn't as scary as he seems and doesn't really have the heart to hurt someone or something smaller than him without having a good reason to and because he sees it as an unfair fight..