How can I let others know I'm a lesbian?

I've heard that some lesbians have coloured napkins sticking out of their jeans or that you should clip your nails a certain way. I'm not sure how true any of that is but I'd like to be able to tell who else is a lesbian. Is there anything I can do besides aesthetics? Maybe gestures or expressions? I'm clutching at straws here, I just wondered is all.