There's a whole laundry list of stuff that can, might/might not, effect sexual response and intensity, can depend upon the person ...
Ginkgo biloba (120 twice daily) can upregulate the release of nitric oxide synthase, the enzyme that interacts with arginine to produce nitric oxide.
Korean red ginseng is very similar, can upregulate mechanism increasing production of nitric oxide/blood flow to the genitals. The dose for a chick is like 1.5g per day, note whether the dosage level is too stimulating, she could stay 'spooled up' all the time, that'd be great for a rainy weekend in bed, but for a Wednesday at the office if might seem like horniness or just anxiety.
Adding damiana leaf (check my spelling) to ^ GK and KRG can cause increased libido, wetness, frequency of sex, frequency of orgasms, and increased clitoral sensation. Not bad.
L-arginine fuels the generation of NO by nitric oxide synthase. NO-cGMP action is responsible for genital sexual arousal response in both genders .. nitric oxide synthase utilizes L-arginine and oxygen as substrates to produce nitric oxide and citrulline. Taking L-arginine directly can supply this for a short time thereafter, for a longer term effect (and a larger reserve pool of arginine in the body) the form called Citrulline Malate is better at that. Preferably the "2:1 Complex" version if you can find it.
Icariin (horny goat weed) blocks phosphodiesterase-5 (PDE5) .. same thing viagra, cialis etc does .. weaker effect but same mechanism. Strongest form is probably a product called
GH-2 that comes with two bottles, one is a more conventional extract, and the other is a water extract .. each process yielding different active components from the source.
Choline and vitamin B5 are important for female sexual response, forming acetylcholine as the primary neurochemical driver for nerves and skeletal smoothmuscles used during prolonged sex and orgasm risetimes. High libido and pre-orgasm sexual responses (lordosis, tension, quivering) are dependent on sufficient/available cholinergic function (high levels of acetylcholine are strongly associated with robust sexual response).
Any chick with fatigued adrenal glands, and that's most people everywhere, respond to a 50mg morning dose of DHEA with dramatic enhanced sexuality, significantly increased frequency of sexual thoughts and interest (libido at all levels), satisfaction with both the mental and physical aspects of sexuality, and improved 'sense of well-being' (this meta-feelings stuff can be important for females), and lower levels of depression and anxiety. Downside might be some acne. But damn that's a big stick.
Yohimbine is supposed to increase genital sensitivity in both men and women by stimulating the sacral nerves. IMO, yohimbine shouldn't be taken long-term, but since the best sacral effect is to take it immediately before sex, there's no real reason to be on-it all the time anyway. This seems like the sort of thing that'd make a brilliant sex lube. I did a quick search and found several products out there, not familiar with any of them.
Other stuff ... Ashwagandha, Maca, etc, ... it's notable that everything listed has overlapping effects with each other .. they tend to boost or compliment the other compounds, so if you're looking for pre-made products you'll find a lot of them with two or three of these.
There's other stuff I'm missing, those are the main suspects. Also there's some alien sexwater called Bremelanotide PT-141 ...
Men's Journal Magazine: ...it took hold. I felt a great surge of affection (greater than any regular level of arousal). My body tingled and I developed an erection that wouldn’t quit. For two hours the drug wouldn’t let me out of its grasp — nor my wife out of mine.
Females: Women who took part in trials said that they felt a "tingling and a throbbing" along with "a strong desire to have sex." For most, effects generally do not take place until a couple hours post injection, peaking around the four hour mark.
Yeah, the downside is it's an injectable. But the additional downside used to be that no one could get any of it. Apparently now it's out there, and not very pricey either.