Young guys have a stronger sex drive and are naturally hungrier for a woman’s body.
Being around a younger guy makes a woman feel younger as well.
No woman is attracted to a guy who is a couch potato or who is unable to climb a set of stairs without being out of breath, especially if the woman herself is very active.
There have been countless stories about young teens meeting up with guys they met on the internet, and none of those stories have ended well.
Even if he seems like a nice guy, there's a huge chance that he isn't, especially if he's willing to have sex with a 14 year old.
An intense physical affair might just be something she needs to enjoy your life and to be distracted from her previous break-up or disappointments in men.