SubhanAllah, what a great conversation between two Muslims. If one sneezes, he praises Allah by saying, Alhamdulillah. One who listens asks Allah to bless him by saying Yarhamukumullah and then the former asks Allah to guide the later by saying Yahdikumullah!
Wow. Sometimes my mind wonders how strange are the manners prescribed to the Muslims. People who pray for each other upon sneezing, can they really hate each other? Wallahi, never. There is a reason why Muslims have a GOLDEN history of ruling the whole world over 800 years!!