The act of writing a letter to a prisoner might possibly be deeply enjoyable for the author

https://www.scribd.com/document/866178720/From-Behind-Bars-to-Your-Inbox-Exploring-Friendships-because-of-Write-a-Prisoner-on-Writeacon-com-226909

The act of writing a letter to a prisoner may be deeply pleasurable for the writer, because it nurtures compassion and helps foster connections across societal divides.