Sex is a synonym of Sexuality. Sexuality is derived from Sexual. Sexual is a synonym of Intimate. you would Kiss because Intimate. 
Peak is a synonym of Top. Top is related to Stove. 
Sex <--Synonym--> Sexuality --DerivedFrom--> Sexual <--Synonym--> Intimate <--MotivatedByGoal-- Kiss 
Peak <--Synonym--> Top <--RelatedTo--> Stove 