Can only be between a straight girl and a lesbian girl. It is when you manage the turn a straight girl into a lesbian for, but is not limited to, one night stands, hookups, relationships. A step up from experimenting but doesn't necessarily lead to permanent bisexual/lesbian status.
My friend Melissa's boyfriend is gonna be upset when he finds out that she hooked up with Vincey. She must be Vincesexual.
A vegan or vegetarian who refuses to have sex with a meat-eating partner on the principle that sexual intercourse is the physical and spiritual bonding of two bodies, and would thus make both people omnivores in spirit, or could result in the exchanging of bodily fluids that may contain animal products.
I couldn't have sex with him; the fact that he ate meat conflicted with my vegesexual beliefs.