Really hard to say without being there to see the body language. Could be going into shed himself. Snakes are solitary creatures, curling up together is usually one dominating the other, not cuddling and since you don't know their sex could lead to issues. Two males may fight, opposite sex might end up with unwanted eggs, or impaction especially if they were underfed. Either way cohabbing is risky and higher stress living can lead to RI's, which would be spread from one to the other. BP's are fairly inactive when happy so if they are roaming around a lot during the day it could be a sign of stress. Mine sticks his head out a lot and sometimes wanders late at night or near feeding day but other than that is in a hide.