Nicky's 'very skilled mouth' was what happened when one had an oral fixation and nine hundred years to practice. He had to have something to balance out the fact that he spoke every language he knew with a thick accent. Including 'Italian'.

"Mmm..then I'd suggest we get out of the pool then, bello. After all, I do believe you promised to put your own mouth to use as well." He arched a brow, a hint of amusement in his expression. "But I can't move until you do. You seem to have me quite pinned."

No he didn't, but it was fun to plant the idea.