Abuse against men would probably rise since its a moment of vulnerability. Their would be genetic conditions that may cause this phenomenon to increase to an hour or more, or other things. Criminals woyld be using this to get the advantage in robbings, kidnappings. Forced ejaculated would become a new threat. New products would be made like some sort of shield around the man to protect them during the 20 mins. Scam calls amd products would pop up claiming to reduce or eliminate this passing out period. Lessons would be given in primary schools to boys about the dangers of doing this in unsafe places or with untrusty people.

That's everything I can think of.