Final answer:
The false statement about child sex play is that it should always be a cause for concern, as such play can be a normal part of development. It is crucial to differentiate between normative and problematic child sex play, and discussing child development including sex play is key for proper education and understanding.
Step-by-step explanation:
The statement that is false regarding child sex play is: b) Child sex play should always be a cause for concern. This statement is not accurate because child sex play can be a normal part of development. However, it is indeed essential to recognize that there is a difference between normative and problematic child sex play, as some forms can be indicative of healthy development while others may signal issues that necessitate further attention. Normative development outlines that children go through various psychosexual stages, according to Freud, and behaviors or interests in this context can be expected as part of these stages. Moreover, social and cultural contexts also play a significant role in defining what is considered normal or acceptable when it comes to child sex play, as exemplified by vastly different practices and norms across global societies. Discussions about child development, including topics related to sex play, are crucial for proper understanding and education of both parents and professionals to ensure healthy development of children.