Dear dreamging715:
His explanation makes sense to me and it sounds honest, that is, I don’t see him hiding something from you or being deceitful in any way- it is a habit, for one, then it is easy and quick, like it always was for him.
A habit before you came along, no difference from his habit of tweeting about the band he likes, a habit from before.
Some habits do change over time, but never underestimate the power of a habit, the strong inclination to repeat what was done before, regardless of new experiences. It takes a lot of time and repetition for the new experiences to become habits.
anita