, ▁family ▁b onds ▁can ▁be ▁strong ▁and ▁affection ate ▁just ▁as ▁they ▁are ▁for ▁humans . ▁T uv ok ▁expressed ▁his ▁love ▁for ▁his ▁wife ▁on ▁a ▁few ▁occasions ▁( without ▁actually ▁using ▁the ▁term ), ▁S are k ▁open ly ▁expressed ▁affection ▁for ▁both ▁his ▁human ▁w ives , ▁and ▁a ▁clear ▁bond ▁of ▁love ▁existed ▁between ▁T ' Pol ▁and ▁her ▁mother , ▁T ' Les . ▁The ▁bond ▁between ▁Spo ck ▁and ▁his ▁adopted ▁sister , ▁Michael ▁Burn ham , ▁is ▁a ▁central ▁theme ▁of ▁the ▁Star ▁Tre k : ▁Disc overy ▁second ▁season . ▁ ▁Fight ing ▁and ▁self - def ense ▁ ▁In ▁the ▁T OS ▁episode , ▁" The ▁Sav age ▁Cur tain ", ▁Sur ak ▁explains ▁to ▁Kirk ▁V ul can ' s ▁history ▁of ▁violence ▁and ▁the ▁turn ▁to ▁peace ▁that ▁saved ▁their ▁civil ization . ▁He ▁tells ▁Kirk ▁that ▁he ▁will ▁not ▁fight . ▁Spo ck ▁says ▁that ▁he ▁has ▁fought , ▁and ▁will ▁fight ▁again , ▁but ▁that ▁he , ▁too , ▁is ▁a ▁" V ul can , ▁b red ▁to ▁peace ." ▁ ▁V ul can ▁n erve ▁pin ch ▁ ▁V ul c ans ▁exhib it ▁a ▁technique ▁known ▁as ▁the ▁" V ul can ▁n erve ▁pin ch " ▁or ▁" ne ck ▁pin ch ", ▁which ▁targets ▁a ▁location ▁on ▁the ▁neck ▁between ▁the ▁head ▁and ▁the ▁shoulder ▁that ▁rend ers ▁the ▁victim ▁un cons cious . ▁The ▁pin ch ▁was ▁first ▁seen ▁in ▁the ▁T OS