The Westermarck Effect is a theoretical psychological effect through which people who are close when they are babies/children don’t want to bang each other when they grow up
Edging (aka surfing or peaking) is the sexual technique of orgasm control.
Nocturnal penile tumescence (NPT) is a spontaneous boner during sleep (usually REM) or when waking. Basically the technical term for 'morning wood'.
Paraphilia, or sexual deviation, is ‘the experience of intense sexual arousal to atypical objects, situations, or individuals’ (DSM-IV).