Seeing the Doctor's reaction was mosr amusing but worth seeing after what recently happen to the Time Lord. Jack watched as the Doctor ate the fish fingers with the with the custard, not seeing a problem with his tastes in food. When the Time Lord offered, Jack decided it wouldnt hurt to try something new. "Sure. Havent tried it." So Harkness took a fish finger and dipped it in the custard. Taking a bite of it and making sure to taste it, chewing thoughtfully. The immortal nodded, giving an interested look on his facial features. "Interesting. This is rather good." Jack turned the fishfinger on the other side he didnt bite down on and dipped it into the custard, eating it contently.
Jack then got to thinking. What happen to the Doctor that made him regenerate into a teenager? Wonder if he would answer. "Doctor? Mind telling me what happen? How you regenerated into a teenager?"