Vasopressin

The hormone that encourages your bladder not to fill after sunset and for a while thereafter. So it won't be full until it's time to wake up.

link with theory of mind in autistic people
Carson DS, Garner JP, Hyde SA, et al. Arginine Vasopressin Is a Blood-Based Biomarker of Social Functioning in Children with Autism. PLoS One. 2015;10(7):e0132224. Published 2015 Jul 22. doi:10.1371/journal.pone.0132224 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4511760/

If I understand this correctly, it's saying that vasopressin may be linked to theory of mind specifically in autistic people. And may be able to be used as a blood-based biomarker. They want to look into making a drug for people who have really bad theory of mind.