An evolutionary account for why men have to wait between orgasms

Why Women Can Have Multiple Orgasms and Men Cannot. Glenn Geher. Psychology Today, Oct 18, 2020. https://www.psychologytoday.com/intl/blog/darwins-subterranean-world/202010/why-women-can-have-multiple-orgasms-and-men-cannot

Excerpts:

I will never forget Gordon Gallup's invited presentation at the 2007 meeting of the NorthEastern Evolutionary Psychology Society. 

This research essentially answers the question as to why the human erection is shaped with the unique characteristics that it has. From an evolutionary perspective, any adaptation that increases the likelihood of an individual being able to achieve reproductive success at a cost of the reproductive success of competitors will be naturally selected. And this explanation accounts for the unique nature of the human erection in a way that matches the data, along with the accompanying evolutionary framework, quite well.  

During the question and answer session, a young male student asked an interesting question. He essentially asked about the possibility of a male pulling out his own seminal fluid. And, in addition, he asked if this clear possibility posed something of a problem for Dr. Gallup's framework.

Dr. Gallup, a seasoned academic, did not hesitate in his response. He first acknowledged that it was a good question. He then paused, looking for the right words, and said essentially this: You may have noticed that after an ejaculation, an erection dissipates quickly. And it becomes uncomfortable for the penis to be touched at that state. I hypothesize that this is an adaptation to reduce the likelihood of the male pulling out any seminal fluid that he, himself, has just released into a female's reproductive tract.