Table 1. Key educational content for each milestone in the MFF game.

Milestone	Content
1: Puberty and bodily functions (same sex as player)	Hair growth, menstruation or ejaculation
2: Reproductive anatomy	Identification of the internal reproductive organs of male and female bodies and their functions
3: Puberty and bodily functions (opposite sex as player)	Hair growth, menstruation or ejaculation
4. Anatomy of intercourse	Act of heterosexual coitus via union of penis and vagina
5. Fertilization	Movements of eggs and sperm, fertilization of egg by sperm.