▁For ▁instance , ▁an ▁external ▁stim ulus ▁may ▁directly ▁ex cite ▁sexual ▁ar ous al ▁and ▁motiv ation ▁below ▁a ▁conscious ▁level ▁of ▁aw aren ess , ▁while ▁an ▁internal ▁cogn ition ▁can ▁el ic it ▁the ▁same ▁effects ▁indirect ly , ▁through ▁the ▁conscious ▁representation ▁of ▁a ▁sexual ▁image . ▁In ▁the ▁case ▁of ▁in hib ition , ▁sexual ▁behavior ▁can ▁be ▁active ▁or ▁conscious ▁( e . g ., ▁choosing ▁not ▁to ▁have ▁sex ) ▁or ▁it ▁can ▁be ▁pass ive ▁or ▁un cons cious ▁( e . g ., ▁being ▁unable ▁to ▁have ▁sex ▁due ▁to ▁fear ). ▁To ates ▁emphas izes ▁the ▁importance ▁considering ▁cogn itive ▁representations ▁in ▁addition ▁to ▁external ▁stim uli ; ▁he ▁suggests ▁that ▁mental ▁representations ▁of ▁in cent ives ▁are ▁inter change able ▁with ▁exc itat ory ▁external ▁stim uli ▁for ▁el ic iting ▁sexual ▁ar ous al ▁and ▁motiv ation . ▁ ▁B anc ro ft ' s ▁dual ▁control ▁model ▁This ▁model ▁created ▁by ▁John ▁B anc ro ft ▁and ▁Er ick ▁J ans sen ▁at ▁the ▁Kin sey ▁Institute ▁expl ores ▁the ▁individual ▁vari ability ▁of ▁sexual ▁response . ▁ ▁They ▁post ulate ▁that ▁this ▁vari ability ▁depends ▁on ▁the ▁interaction ▁between ▁an ▁individual ' s ▁sexual ▁exc itation ▁system ▁( SE S ) ▁and ▁sexual ▁in hib ition ▁system ▁( S IS ). ▁Popular ized ▁by ▁Em ily ▁Nag os ki ' s ▁self - help ▁book ▁Come ▁as ▁You ▁Are , ▁the ▁S ES ▁has ▁been ▁described ▁as ▁the ▁sexual