Want to have more sex not less.  Good luck in training your girlfriend to stand down.  I am available to help her ?????
 I see this as another attempt to neuter men and confuse sexuality that is out of control in this country.

Barebear3,  
  If any man has a problem with a female on this type of subject, then he needs to tell her and talk it out with her. If the female gets nasty then leave her.

I'm 70, and if I can get off twice in a day, that's a good day.

I have had gals stay over, and they want me to get it on with them just hours after our first romp.

They were understanding enough, but still and all, I felt some pressure.    

I think this is one of those problems that doesn't get mentioned too often for obvious reasons, but does happen as man women seem to get a second sex urge after menopause while men just continue to decline.

I have on occasion run into this, even in my late 20s once.  When she wanted it, she wanted it.  Most of the time it was not a problem, but there was that 10% of the time I wasn't quite there.  She was very horny, BBBJ on first date horny.  

More recently I got a bit involved with a Chinese lady from an AMP for awhile.  On rare occasions when we would do an overnight, after we had sex she would keep wanting more.  I would be laying there half asleep then suddenly feel her reaching down there and start playing with my junk wanting more.  I think the main issue where was that she was not that into DATY, or at least she thought she was not that into DATY.  With more time maybe she would have come to realize what she was missing.  She just seemed a little insecure about that position.  Unless you are in that situation, the best fix is to just go down on them until they have had their fill, then move to the main event.  Even if I'm not up for a main event, I'm usually fine with accommodating DATY to address the issue.