I use Facebook mostly for keeping up with guys that I served with in Vietnam, I get to hear first hand about the latest in their world. You can guess the age from that, the only other use of Facebook is family, easy to keep up with grandkids. I retired 17 years ago because of injuries sustain in Vietnam, and a few medical rounds of dancing from the results of being sprayed by Agent Orange. I am pretty well crippled up, riding a bike with 2 bum legs is possible as long as I keep the ride to a couple of blocks. I had a small homemade version of a sidecar to haul my walker on. But got rid of it after a triple bypass. I stumbled on this forum while surfing, and it put the urge back in me to ride a bike again.
Facebook is great for visiting and show and tell. But when you need help or want to help someone, having to look for stuff to keep up with a thread is a pain. I mentioned game calls and their forums, I have been a duck call maker for 52 years, as long as Duck Dynasty's Robertson. After the migration to Facebook, I sort of quit answering questions, too many accounts, too many mickey mouse forums to keep up with. Then people started sending emails, finally put a stop to that, if they want an answer from me they have to go to the forum, but that only works part of the time.
As to motorized bicycles, my first was a "contraption" to run around my grandpa's ranch. An unknown brand bike with balloon tires, a small B&S motor with a slip clutch using a long arm to tighten the belt to get power to the wheel. That was in 1963, never saw it again after that summer. I am here now to find out the latest gadgets. Not looking for speed, just reliability, if I need to get there in a hurry I will use the car.