> People tend to act in accordance with their beliefs.

Professionals tend to act professionally. Just because most people are horny & sexual doesn't mean that they need to hump each other at work or at conferences. I expect professional behavior regardless of your personal beliefs. Now, personally I'd prefer people to also look professional (fully clothed, no religious symbols, ...) so I wouldn't necessarily disagree with such rules, but they're usually (as evidenced by this very OP) applied inconsistently, politically.