Lights Off

There was this couple that had been married for 20 years and every time they made love the husband insisted the light was switched off.

After 20 years the wife thought this was pathetic so one night when they where in the middle of a screaming sex session she switched on the light.

She looked down and saw her husband using a penis shaped vibrator on her, "you impotent bastard" she screamed. "How could you be lying to me all these years? you better explain yourself ?"

The husband look at the wife straight in the eyes and said "You'd better explain the kids then?"