Real Time host Bill Maher blasted the the hypocrisy of marijuana laws in the U.S. during his weekly television segment on Friday, lighting up a joint to prove his point.

“It’s not a tenable situation,” Maher said, referring to conflicts between state and federal marijuana laws. “When I leave Colorado, Oregon, Washington, or Alaska, my back pain doesn’t go away. Or whatever it is I have."

Maher argued that marijuana policy in the U.S. is hypocritical given the fact that alcohol and tobacco — substances that are significantly more dangerous and addictive than cannabis — are legal and regulated by the federal government. While 23 states and the District of Columbia have legalized marijuana for medical or recreational purposes, the substances remains illegal under federal law.

“It’s not a bad habit,” Maher said. “It’s a fantastic habit. Unless, like anything else, you over do it. It’s way different than cigarettes — mainly not linked to lung cancer. And no more dangerous than alcohol? Try way way way less dangerous.”

Watch Maher's full defense of marijuana legalization here.