Carper hopes people catch the humor he intended.
"I'm really trying to send the message that it's an important job and an important position, but people really need to lighten up a bit," he added.
A little humor in politics is needed, especially in partisan times like now, he said.
"We're heading into very contentious times in West Virginia politically," Carper said.
Although Carper believes most people will get the joke, chalking it up to him "just being Kent," he realizes a political opponent could use the mailer against him in races to come.
He's not worried.
"That just comes with the territory," he said. "The people who don't like me will criticize me anyway."
Carper said he came up with the idea on his own.
"I think it's original," he said. "Everyone I've sent it to so far just breaks out laughing."
He discussed it with campaign consultant Larry LaCorte before the idea was finalized. The photo shoot took only a few minutes.
Rainmaker Media Group took over from there, Carper said. The company handled the layout and the graphics.
Carper was unsure how many were mailed. However, he will be sending the invitations via email as well.
"They're being mailed out to a lot of my friends, supporters and political enemies just to annoy them," he said with a laugh.
Asked if there was anything he would like to add about the mailer or the event, Carper was ready with a laugh and the response, "It's a cash bar."