Gay rights activist, author and syndicated columnist Dan Savage has invited Ben Carson to suck his dick.

During an appearance on CNN's New Day, Carson, a possible GOP presidential candidate, said that prison can make people gay.

“Absolutely,” Carson answered when asked if being gay is a choice. “Because a lot of people go into prison straight and when they come out they're gay.”

(Related: Ben Carson opposed to marriage equality because some inmates turn gay in prison.)

Later in the day, Carson apologized for the remark and vowed he would no longer talk about gay rights.

Savage, a co-founder of the It Gets Better campaign, responded in his syndicated column.

“If being gay is a choice, prove it,” he wrote. “Choose it. Choose to be gay yourself. Show America how that's done, Ben, show us how a man can choose to be gay. Suck my dick. Name the time and the place and I'll bring my dick and a camera crew and you can suck me off and win the argument.”