:In early life, usually before puberty, males are quite flexible regarding their preferred sexual incentive,[clarification needed][17] but they later become inflexible. Females, on the other hand, remain flexible throughout their life cycle. This change in sexuality due to variations in situational, cultural, and social factors is called erotic plasticity. Beyond this, very little is known about sexual desire and sexual arousal in prepubescent children, or whether any feelings they may have are comparable to what they will experience as an adult.[9]