Nacho very much enjoys pets and physical contact, (At least most of the time) but its recently been discovered he is incredibly ticklish and sensitive in certain areas. This seems to be between his plates, antenna, inside his leg pods and areas under his armor. This sensitivity seems to be increased after a fresh molt, though contact and cause damage as his armor takes a couple of days to harden up, so contact must be applied sparingly and with great consideration, He also has very little energy during this time.
Regardless Nacho being given some pets, Gotta be careful of that tail though, that thing is very strong indeed.