OK, clearly some women have all the luck. Not everybody looks forward to going to the club to get in a workout, but if you are a victim of the tragic malady of EIO, it might be understandable why you'd be ready for your gym class just about anytime.
And well, I have a confession to make - a few times (fortunately not many) while performing a vigorous and challenging set of situps, the same thing happened to me. And I'm a man. I did what was necessary to take care of the consequences. I expect that the stimulative mechanisms which caused mine were a little different than that which allowed the women to maximally enjoy their exercise session.