This has nothing to do with PDAs, but it has to do with using greek letters to abbreviate stuff. In high school, when we were in class talking about a keg party going on that weekend but didn't want certain people to know what we were talking about, we called it a Kappa Sigma Gamma party. (OK, sigma doesn't have an E sound, but it kinda looks like an E. Besides, my guy friend whose brother was a Kappa Sig came up with the name.) If people heard us say we were going to a Kappa Sigma Gamma party, they assumed we were going to some fraternity party at nearby USC, so they couldn't show up uninvited. Besides, people thought we were cool to be hanging out with college fraternities when we were only 16.
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"Seek the noblest."
Zeta Love! <3