A game that is played by many Japanese high schoolers. A group of teens, with an equal number of boys and girls, gather at a private place. The boys and girls all pair up and have unprotected sex. After all the boys ejaculate, the couples switch partners. This continues until every boy has had sex with every girl (and visa versa). Now because the girls are at different stages in their cycles, some will not get pregnant (they escaped the bullet as in Russian roulette) and some will get pregnant (they got the bullet as in Russian roulette). But unlike the real Russian roulette, for the girls who got the bullet in this game there is a way out. Because, prior to playing, each player is required to put 5000 yen into a pool called "ejaculation insurance". The collected money is then used to pay for the abortions of any pregnancies that result.
Do the Japanese teens who play Russian sex roulette all get tested to make sure they don't have AIDs, or could that be another aspect of the game?