Well, first off no need to take omega-6 fatty acids at all, for most people. The modern diet is unnaturally high in them already. Because we feed our livestock grain rather than letting them graze, our meat is high in omega-6 fatty acids. Free range meat, seafood, and wild game are all high in omega-3 fatty acids, and are what we evolved to eat.
I caution strongly against using any kind of a dopamine drug as an aphrodisiac in women. They do work, in fact right now several dopamine drugs are being developed by big pharma to treat female sexual dysfunction. Only problem is a pharmaceutical source of dopamine generally loses it’s (dang that spellchecker) punch over time requiring more of the drug to achieve the same effect, and eventually just to feel normal. Cocaine and heroin are dopamine drugs. I’m not saying bromocriptine is as addictive, but honestly if you are going for a safe long-term way to raise dopamine, omega-3 fatty acids are the way to go. You can be sneaky and start cooking her lots of fatty ocean fish to eat. :D Or you can go ahead and get her the fish oil.
As for other women’s “aphrodisiacs” that work, I have found four. Most male aphrodisiacs don’t work for women, because men are focused on penile hardness and lasting long. Most men’s aphrodisiacs actually slow down orgasm and raise serotonin levels—both of which interfere with female sexual functioning.
Damiana is good for women, but should be used sparingly (and certainly not used by pregnant women, nursing women or women trying to get pregnant). Either brew a tea or take damiana in pill form before having sex. Works a bit like alcohol, so don’t drive after taking it. ArginMax for Women has passed a double-blind placebo-controlled test (although I am convinced it doesn’t work as well as my diet). Zestra is a topical sensation enhancing oil for the clitoris that has also passed a double-blind, placebo-controlled test, although not to everyone’s taste. And I personally am very fond of the brainsync Ecstasy CD. You need to listen to it with headphones to get the full effect, but it produces a relaxed theta state good for arousal.