He was obviously using it to sharpen his teeth, dere, and as to your questions
(1) I’ve no idea as to Joy’s age (…it’s rude to ask a lady (I use that word advisedly) her age) - is it also rude to care when the lady in question is in a (IMNSHO) poorly-written radio-soap?) - she seems to be written as a ditzy twenty-something! (…again IMNSHO)
(2) I could check on-line (…t’InterNet is sure to provide an answer) but there is always the possibility that Joy might be on the outer edges of the bell-curve!