Here’s the proof:
I'm so proud of you, Dr. Chan : )
That’s what he posted on his GF’s Facebook wall for getting her degree. There is, of course, nothing necessarily wrong with complimenting a women for genuine accomplishment (she has her degree from UC’s school of medicine, so it’s not a garbage degree like, say, womyn’s studies). But emoticons? Those should only be used by middle-school-aged girls.
* For further proof of Zuckerburg’s crippling betatude, check out the pictures of his “girl”friend in the linked-to article. Also see here.