right-handedly

"Right-handedly I'm a dedicated military sort."

To a question, disguised as a musing, as to why his pen-and-ink writings are carried out right-handedly for prose and left-handedly for verse, he simply announced that his coat has two sleeves.

Since many everyday devices (such as can openers and scissors) are asymmetrical and designed for right-handed people, many left-handlers learn to use them right-handedly due to the rarity or lack of left-handed models.