It’s a huge source of immense sexual pleasure and satisfaction, a massive bundle of nerves waiting to be stimulated to send us over the edge of deep-rooted, good desire. Our first experiences with sex are often both the most frightening experiences of our lives and the most exciting (with a little awkwardness thrown in there, too). They prepare us for our lifetime journey of discovering what turns us on and what doesn’t, what we’re willing to try and what we’d never try again.
While we unearth our sexuality, we learn about the most obvious places through which we can achieve pleasure — namely, our genitals. But what about the lesser-known ones? What about the places that have remained hidden, that we only notice when someone actually starts touching us there, stimulating a previously uncovered zone that makes us experience new sexual pleasure.

Here are those mysterious, sexually enchanting erogenous zones that satisfy both men and women.

Back and nape of the neck

The reason your neck is such a hot spot: it’s extremely sensitive, full of blood vessels, and is associated with vulnerability. Soft, lingering caresses are clutch. But if you’re craving more pressure, have your partner start at your shoulders and massage your neck from the base to the scalp.

Ears

According to Menshealth.com, the ears are an erogenous zone for both men and women. Use your thumb and index finger to gently grasp that spot where the ear lobe connects to the tissue near your partner’s face and pull down. There’s apparently no real science about why this works, but it’s good to know anyway.

The Inner Wrist

Because we’re not used to being touched there, the wrist — especially the inside of the wrist — can be an exciting spot. Touch gently at first, allowing your partner to connect with the fact that you’re touching them sensually. Taking a second and making eye contact can go a long way toward creating a mood.

Feet (soles for men, toes for a women)

For a man, the soles of the feet are a pleasure point. If you go to the third toe and head one-third of the way down, WebMD says you’ll reach an acupressure point nicknamed the Bubbling Spring. It received its name because of the sensation of energy “bubbling up” a man’s legs to his genitals.

For a woman, her toes are the sweet spot. This is where the phrase “toe-curling orgasm” comes from. There’s a real link between a woman’s vagina and her toes, causing her toes to reflexively curl when she reaches climax. If you take a woman’s toes into your mouth or softly pinch the sides of her big toe and roll it between your fingers, it’ll activate the reflex backwards, which could induce orgasm.

Back of the knees

It’s another nerve-rich area where we’re not often touched. For men, the back of the knees are erogenous because there’s less hair there, so it’s more sensitive to touch, says Ian Kerner, Ph.D., a New York City sex expert. For women, it just feels really good. Try gently touching your partner behind the knees while he or she stands in front of you. Or massage them there, alternating between deep pressure and a tickle.

Ref: https://www.webmd.com/sex-relationships/features/7-awesome-erogenous-zones#1
https://www.womenshealthmag.com/sex-and-love/erogenous-zones-for-women/slide/6
https://www.menshealth.com/sex-women/do-you-know-her-pleasure-points