A blonde walks into a bar, the guy at the counter says to her, "Are you a natural blonde?" "Why, yes, I am", says the blonde. "Can you prove it?" asks the guy. "How do you propose I do this?", asks the blonde. "Well, pull down your pants & I'll be able to tell, if you're a natural blonde, you're 'hair down there' will be blonde as well ." states the guy.
The blonde thinks about it for a minute, looks at the guy & says, "O.K., I will" She pulls her pants down & is covered in thick, black hair. The guy laughs & calls her a liar. She asks him to do her a favor now. "Place your thumb on the counter, I have a point to prove." She says.
The guys laughs again, rolls his eyes, and places his thumb on the counter. The blonde hits his thumb as hard as she can with a beer bottle, it immediately bruises. The guys jumps up & asks her, "What the hell was that for?"
The blonde smiles, and says, "Look, and that was only banged once."