When asked by a friend how his night with Taylor went, John laughed, and boasted, “How do you think it went?”

While HollywoodLife.com is reporting that John Mayer is dating Taylor Swift, In Touch can exclusively reveal that John told a friend that he and Taylor hooked up when they were both in Nashville, Tenn., on January 24. According to a source, the couple met up several times, in public and private, and were first seen getting cozy in a recording studio. “She was sitting on John’s lap, her arms were around him, and she was talking in his ear,” says the source. “They were acting like teenagers.”

That night, John, 32, and Taylor, 20, dined at the restaurant Cabana and were joined by friends afterward. The couple left alone and went back to The Hermitage Hotel, where they arrived in the loading dock to avoid being spotted and were escorted to John’s suite, the source claims. Both of their reps deny the story. But the source claims, “Taylor spent the night and enjoyed mid-morning room service before leaving his suite the next day.”

Though the source says that Taylor “adores” John, it seems the womanizer is up to his old ways, involving yet another starlet in boosting his career. When asked by a friend how his night with Taylor went, John laughed, and boasted, “How do you think it went?”