fingernails

me : Oh, my fingernail is out of shape.

her : I didn't know you care about these kinda things. Let me see.

me : Sure I do. Here, my middle finger.

her : What! Hey sis, your son just showed me something obscene. He showed me his middle finger!

me : I have to care about my fingernails, else people won't take it seriously when I showed them my middle finger!