Based on the context and the answer, generate a question. 

Context: Lesson 1 : A man is getting into the shower just as his wife is finishing up her shower , when the doorbell rings . The wife quickly wraps herself in a towel and runs downstairs . When she opens the door , there stands Bob , the next - door neighbour .

Answer:

Bob saw his wife in a state of vulnerability .



Why would the man be upset at Bob ?