As with physical pain being a constant reminder that one is in a physical vehicle, sexual sensations and other addictions are also a reminder that one that is limited by the thought/experience processes of the vehicle that one incarnates within.
Clearly some of the sensations we feel whilst incarnate are a joy to behold when experienced. However, some such as addiction to sexual sensation such as touch, taste, smell and sight are all sensations that are limited to the entity whilst it is incarnate. In the energetic we are above these sensations and therefore not affected by the potential additive qualities of them, which being borne by the need to be incarnate to aid our evolutionary commitment, and subsequently experienced on a daily basis are therefore a link to the low frequencies of the physical. Be vigilant of all sensation for it is insidious in its addictive qualities.