@justnormalkorean While an interesting theory, how would these parasites spread between gay males if they are modifying behavior? You can't get parasites from having anal sex with someone because the parasites live in the digestive tract. It's more likely that effeminate gay males intentionally ingest parasite eggs (from one source or another) to stay thin without needing to do much. Unfortunately, we'll never know for sure because it's stigmatized to find out why so many have parasites.