Ever stop to think about how medical marijuana is like sushi?

That's the premise for the first-ever medical marijuana TV ad, which aired on Comcast stations in New Jersey late Monday night.

"Yo, you want sushi? I got sushi. I got the best sushi," an actor playing a dealer tells the camera shortly before opening his coat to show it is lined with sashimi. "Ain't nobody sellin' but me."

Then, a disembodied female voice interrupts.

"You wouldn't buy your sushi from this guy, so why would you buy your marijuana from him?" she asks.

(Photo Credit: MarijuanaDoctors.com)

The ad is for MarijuanaDoctors.com, which aims to connect patients in states with legalized medical marijuana with doctors who will prescribe it. Twenty states and Washington, D.C., have legalized medical marijuana since 1996, according to the U.S. Office of National Drug Control Policy.

"We recognize that the sale and use of marijuana is still considered very controversial and we are pleased that Comcast understands that there are legitimate businesses providing legitimate and legal services to people who have legitimate needs," Jason Draizin, founder and CEO of MarijuanaDoctors.com, said in a statement.

Comcast spokeswoman Melissa Kennedy today said the Monday night ad was the first of others that will only air in states where medical marijuana is legal. The ads will air between 10 p.m. and 5 a.m., she added, but exclude children's and family programming.