[abstractbeliefs]

The important bit is the bit in between, in parentheses: "ego affects comfort level".

Are you feeling big and developed enough to talk to someone of the opposite sex? While ideally it would make no difference, it's certainly the truth that many of us are happier to engage socially with those of the same sex than those who aren't.

[shmerl]

I think they mix up ego with confidence, Those aren't the same thing at all.