Strange rules at universities in Singapore?

Strange rules at universities in Singapore?
I'm going to study in Singapore and from what I've heard, many rules are much tougher there than in Western countries.
I also heard that there are some strange rules at university, like chewing gums are not allowed, people are not allowed to kiss and hold hands on the campus and you always have to greet your professors with a bow. I'd like to know if any of those are true, because the guy who told me this was kind of weird, so I don't really know whether to believe him or not :D
Strange rules at universities in Singapore?
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