Like intellectual Bombast or physical Abdication, which are vices about sabotaging a partner's status at the cost of our own success, "faking it" behavior, or Charlatanry is a character "vice of deficit of Competence" that sees one as being the essence of "win/lose" or destructive in a way our grandmothers might have advised us to "not cut of your nose to spite your face." Only in this case, it is about faking as if we have resources and power to please or distract a partner, which secretly sabotages the whole overall goals of the relationship and therefore the partner. It is not a team approach. It makes the Poseidon, or "father instinct" feel terrible and not the master possessor of resources he likes to be, and makes the Hera, or "queen of resources" in women feel dishonored, and therefore not able to grant ownership of resources, which is her instinctual romantic and spiritual right as a woman. Similar to "wasteful fraud" as opposed to mere "negligence," but with the "sabotage" of community resources by the charlatan. It is unattractive sexually, therefore.
In being unjust as a partner at contributing to achieving a goal, the charlatan partner is only pretending to have real and true skills but is instead utterly wasting the resources of the other partner on joint efforts meant to be honest and real, not fake or unattainable. This is misleading the partner into thinking that you are a resourceful and happy person when you are not, and leads many to comment at the end of the relationship that, "I feel let down and hollow," or "I feel baited and switched," or "what looked promising is not what I ended up getting from you." That is the charlatan's usual effect - through the holes in the boundary of the cowardly partner.
The charlatans use an Immature Ego Defense, called, "Idealization" - which is like "a mirage, where one starts to self-delude into thinking that what's possible is already probable," or worse - that what is only a wish is somehow an actual attainable reality. (The Ego Defenses guide us in finding friends and mates who happen to have similar maturity levels.)
It is pathologically narcissistic to be charlatan-like, because we usually want to be its mature version, given that Charlatanry produces destructiveness, and a "win/lose" behavior, while Competence, makes for "win/win" behavior.
The other vice of Competence as a virtue is that of moral deficit, called, "Usurpation" or "self-nomination," where a person of basic skill at something "assumes they have the right to take over resources," just because they happen to have some skill and want the same goal as us, when they really have no qualifications, boldly and ignorantly take over the couple's resources (and employing the Defense Mechanism of Rationalization as their strategy for constantly revising what is "true" between them in their real goals.)
Someone who is romantically making use of charlatanry is a thief, indirectly taking resources away from the goals and dreams of a mate, by pretending to have competence at a task that actually wastes and burns the community resources on things that don't better their lives.
As a vice which makes partnership within relationships fail to get to goals, and is intellectually unattractive, consider cowardly behavior to be negative in many ways, including in sexual attraction, since it actually depletes the reserves of one's own, or the other partner's masculinity or femininity"