My sons both ride.
A few years ago I tried to do a Father's Day mountain bike ride with them. We went to the least technical trail that they ride. Do you remember that commercial with the mountain bike rider falling off of his bike and the bike rolling down the hill? I did something like that only I left the bike up by the trail and I rolled down the hill. My sons were proud. They told me that when mountain biking if you're not bleeding you didn't try hard enough.
Now they want me to do a road ride with them. Fortunately, there's no way I'll be able to keep up with them. Maybe when my bones heal I'll give it a try.