Come on, Karis is a big protective softy deep down :P :P Also, lets not forget the legacy left by Ai no Kusabi! Strong semes need strong ukes to make the abuse look sexy. A dynamic like in Okane ga nai (in this case it's even worse) is just sad and can only be saved by this "lack of comprehensible emotional follow up" trope. Ejaculating while being scared $hitless he will fall of the balcony?!? Please... Lets hope Kyon's character gets a better writing later on.
Just because Kyon is not as strong as Karis doesn't mean his character is bad writing....some people really need to get that and stop pushing their own thoughts onto the characters.

Yup! I said it! I ship them 100%. Just imagine all the main couple's scenes rewritten with Karis in Kyon's place. Now, that'd be hoOOot!! Ahh... I demand a doujin... paahhleeeze^^^^
(Kyon is an "always & without fail" horny prop but Karis.. woooh honey! he would give Lucaon a run for his money)