I use my Honda TMX 125 Alpha almost every day for errands, family trips, and regular commuting, so I try to take good care of the engine.
One thing I often hear from other riders is that after a long ride, you should let the motorcycle idle for a few minutes before turning off the engine. According to them, this helps the engine cool down properly.
I became curious whether this is actually necessary or just a common riding habit. After searching for more information, I found a video where the creator tested both situations: turning the engine off immediately after a ride and letting it idle for a few minutes first. The test suggested that the latter may just waste fuel.
The video explains the results clearly and may help answer the question for other riders as well. The video below is in Tagalog.