When I write a paragraph that largely has to do with internal thought or one person of each gender, I revert to using He and She throughout the paragraph. After having stated who He is, and who She is, I figure he and she are fairly well understood. Does this carry into every paragraph after until a new he or she is involved? Is there a limit? It feels... dry and clinical to write Alex and Theresa in the beginning of EVERY paragraph, like it's become a pattern of stating who it is when it seems very obvious.