The R&B singer has been approached to sing the song — with the lyrics, "Let me show you how your p— works/Since you didn't bring it to me first" — at porn film industry's AVN Awards, TMZ.com reported.
McKnight wrote the song, he told the gossip site, out of boredom as he's stuck at home waiting for Achilles tendon surgery: "I've been home for a month, I have this boot on my foot."
He came up with the ditty, a huge departure from his slow jams like "Anytime," after asking his Twitter followers for suggestions of naughty song ideas.
When "If You're Ready to Learn" hit the Internet on Tuesday, it became an sensation, and the song will hit iTunes next week.
Considered the "Oscars of Porn," the AVN Awards will next be held in early 2013.