Reminds me of the young man who went into a parlour, and when reading the price list noticed that for an extra £20 he could have a girl with 3 nipples. Intrigued, he paid his money and saw the girl who had 3 splendid nipples, of which the one in the centre was by far the largest. He feasted mightily on these as he shagged her, and was most satisfied with his encounter.
The following week he went back and saw the girl again, but when she disrobed he could see only the usual 2 nipples. He demanded to know what was going on - "Last week you had 3 nipples" he shouted.
She smiled sweetly, and said "Sonny, you don`t get to suck out a boil like that EVERY week"
Now I know that doesn`t answer the O.P.s question, but I hope it might divert his mind from dwelling too much on it.