U.S. Supreme Court justices expressed worries on Wednesday over the availability of online pornography to minors as they weighed the legality of a Texas law that requires pornographic websites to verify the age of users,

The Supreme Court weighed whether an explosion in online pornography requires repudiating the court’s precedents concerning sexual content as the justices Wednesday heard arguments in a challenge to Texas’s age-verification law for porn websites.

A Texas anti-pornography law is going before the Supreme Court in a collision of free speech rights, regulation of online content and how to protect children.

As the justices took up a case about age verification for online adult content, they struggled to wrap their heads around the state of the industry itself