I had often heard of Mr. Fitzgerald's propensity to duelling.
He was still a little suspicious of his chum's propensity to tease.
This propensity he inherited not only from his mother, but also from his father, who had been a frontiersman.
He, had a propensity to talk about "his Pedro," as some men will talk of their dog.
Are you never able to restrain your propensity for ...