I don’t know your city, but in America it’s very well established that riding bikes on the sidewalk is less safe for cyclists as well as other sidewalk users. This applies to e-scooters just as well, and includes car dominated cities.
Turns out people are really bad as judging relative risk when it comes to traffic. If you live in a modern western city, I bet your city is the same.
Yup some Daoist secs historically believed semen contains life force. Via “retention of the semen”, a man could maintain his vital life force and slow aging. However, having sex would generate life force. So you could extend your life by having sex as much as possible while controlling how often you ejaculate.