Another Redditor recalled: 'I used to have a roommate that had been a bartender for Club Med, and he said they had a fantasy soccer game where you could only pick a player if you had slept with a girl from that country.
'Apparently having two or more complete teams was not uncommon.'
One man with the screen name KingLeonidatass had a similar story. 'Sleeping with someone purely because of their nationality,' he wrote.
'I went travelling for a year and played the Flag Game, it's simple, get as many nations flags as possible by sleeping with someone from that country, the rarer the better. Azerbaijan is my best.'
When a fellow Redditor asked to see his 'list', he responded: 'Germany, Finland, Sweden, Ireland, Thailand, England, Scotland, Azerbaijan, France, Australia, USA and I forgot New Zealand off my last list, I'm sure there is another one I'm forgetting.
'It was around 3 years ago I got the most of them.'
A fellow Redditor raised eyebrows with their confession that they'd given oral sex during a school bus trip - subsequently being expelled from their Catholic school.
One man wrote: 'I realized when I got divorced I had just had sex with five different women in seven days. So then I challenged myself to have sex with seven different women in five days.
'Mission accomplished five days later.'
