"Mm-hmm."

A very tiny part of Jack's brain is pointing out that Ianto is an employee, several hundred years younger than him, recently breaved and even more recently traumatised. Unfortunately, the rest of him is Jack Harkness mid-flirt and it would take considerably more than a little twinge of conscience to dam that particular river.

"Scientifically proven. Far smaller chance of burning than applying direct heat, and really quite efficient."