It means that people who are too rational cannot get love. Only stupid or addicted people will go in and lose themselves repeatedly. This sentence is a view of love. In love, if they are too rational and love is delicate, it is impossible to immerse themselves in love. When two people are in love, their hearts must be constantly changing. When their hearts change, people easily become more emotional. If they are too rational and have no emotional things in this process, then such love is not pure, and of course they can't devote themselves wholeheartedly. Only from the emotional point of view can people constantly lose themselves in love.