[Lanfear]

Simple.
People are attracted to people that appear happy and social to people that appear moody and desperate.

Therefore, most people are more likely to be hit on when they're in a relationship.
Nothing is more attractive than when you're happy and comfortable with yourself.

Also..
You, flirtatious? Ha! I had no idea. c:
Come keep me warm, Rem.

Gaius, it's a quote from the German philosopher Friedrich Wilhelm Nietzsche. c:

I for one would certainly give him a chance with a line like that, providing I found him attractive in some manner. Ha!