Quote: She said "I've never know you to be self-conscious". I'm not sure what that meant.
I think that she meant that since she wasn't aroused, you might be embarrassed to be in an aroused/sexual state in front of her- the way someone who is drunk might be embarrassed or feel vulnerable around someone who is sober. Whereas you were really just feeling like her being "sexually sober" was a buzz-kill.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver