Pat there are some great lefty guitarists out there, however if he can play right, do it! It simplifies everything, especially the stringing of the instrument and the lack of L handed guitars is a real problem for some guitar brands like Strat. Hendrix played a regular guitar turned upside down, which changes the string pitch slightly especially on a Strat due to the string length discrepancy and it reverses the string lie over the pickup, which is one reason he got an unusual tone. Also, if he gets into learning guitar books which have TAB, the L handed thing will be a real problem. If he learns to read notes, then no problem. Finally, in swapping licks with other players, it will translate quicker if he frets with the L hand and picks with the R. So...my opinion, if he can, keep RIGHT, especially since it feels "OK" for him to begin with.  
Thanks Eugene,
The guitar I am going to buy was a Fender Strat. He does not want acoustical.