“Opposites attract” primarily refers to the immune system. People are naturally attracted to people with an opposite immune system from theirs. Which is why some people can smell better to you than others. Opposite immune systems will smell better and those that smell horrendous may refer to people that have immune systems that are too similar. Because when people with opposite immune systems breed, their offspring will have a stronger immunity.
When it comes to opposite personality traits, as time passes a greater rift can start to divide them
No your heart does not stop when you sneeze.
The changing pressure in your chest due to sneezing also changes your blood flow, which may change the rhythm of your heartbeat. The next beat may be more forceful and noticeable which leads to the ‘skipping a beat’ sensation.
The origin of “Bless you” comes from a couple things. When the Bubonic plague was spreading around, sneezing was a common symptom. People would say “god bless you” in hopes that the prayer would protect them. Some cultures believed that sneezing would release evil spirits which would then be exposed to others. The blessing was said to protect those that sneezed and those around them.
Futuristic humanity resides underground, with no one having been to the surface in thousands of years. Recently, large tremors have been detected that originate near the surface. A team is sent up to investigate.