"Blow In Their Ear" joke

Q: How do you tell when a blonde reaches orgasm? A1: She drops her nail-file! A2: Who cares? A3: She says, "Next".A4: The next person in the queue taps you on the shoulder.A5: He's had his clothes for about 2 minutes.A6: I mean, who really cares? A7: The batteries have run out.