At the federal level, the nationwide age of consent for any visual depiction is 18. person, male or female, must be 18 years of age to lawfully consent to visual depictions of a sexual nature. In Kansas, the age of consent to engage in sexual activity is 16. At age 16, our legislature presumes that people are old enough and mature enough to decide whether or not they want to voluntarily engage in sexual activity. There's no cut-off for the age of the other participant to the partner.