Book of Erotic Fantasy
Author: Gwendolyn F.M. Kestrel
This ring-shaped object is worn differently by each gender. Males wear it snuggly fitted to the base of their penis. Females wear it pierced through their labia (requires a Profession (piercing) check DC 10). It grants a +2 enhancement bonus on Constitution checks made to sustain sex (see Sustaining Sex, page 44).