affinity for(redirected from an affinity for)
A passionate interest in or affection for something or someone. She must have an affinity for women with dark hair because her girlfriends are always brunettes. You can always find Lucy at the library—she has a real affinity for reading.
affinity for someone or something
a strong preference for something; a strong liking for something. Mary's affinity for classical music accounts for her large collection of recordings.