I'll bet that his favourite subject in college was philosophy and he had heard the lecture about Greek wisemen saying that "love of the mentor towards young boys is the highest form of love" one time too many... LOL
Batman: "RRS, stop mocking me! I imagined that Selina would scratch my car while parking in some tight spot in Gotham... or will be hanging her catsuit and undies all around my cave... and the worst thing: she'd force me to always leave my Bat-toilet seat down!!
And now we leave peacifully with Robin, we both like fast bikes... bat-fishing, bat-bowling... it's cool!"