Affinity is mutual, except in Chemistry. Say: An affinity between, or an affinity with. Do not say: an affinity for or an affinity to.
E.g., Say, She likes children. Do not say, She has an affinity for children.
Trask, RL (2006), Adapted
E.g., Say, She likes children. Do not say, She has an affinity for children.
Trask, RL (2006), Adapted