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					Originally Posted by bold_n_brazen  Clearly you have never encountered the male ego.
 "What??  You're not done??  Why?  What??   I can make you come.  YES I CAN!  I can and I will.  Here, let me try again."
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 Laziness > Ego
And, 
Only a supreme fool thinks he can make her come every time.  Stupidity being a turnoff, this will make her even less able to come.  
(There is a female-initiated version of this: Failed Blow Job Guilt.  Some women can't grasp why or accept that a guy can't come from their blow jobs.  She'll try and try, and he'll feel guilty about not coming, which will make him less able to come.  And thus a vicious cycle will ensue where there's all kinds of sucking going on, but nothing but frowns and long faces, and detached mandibular joints, all around.)