What are some fun/kinky things to do with your partner?

Mutual masturbation

Pregnancy play. Ask a woman who's stopped menstruating but wishes she could have more kids whether she wants a boy or a girl just before cumming inside her.

Hot tubs

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Open her up with a speculum and see what's inside. Give her a mirror or take pictures for her.

Try different sex positions - Read and go through the Kama Sutra.

Temporary body paint

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Bite hard on a tough part of you partner's body, like their heel without breaking the skin. Endorphin rush

Sex on a hard floor or rug rather than a soft bed

Candle wax play

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Nude co-ed sauna. (Russian banya)

Fall asleep spooned up, coupled. Can you stay that way when you wake up?

Sex on the beach

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Mutual massage which may or may not get erotic

New lingerie

I gave him everything. He said he loved me. Why?

Take a sexy shower together. Soap makes pretty good anal lube and clean up is easy.

Sex with other couples (or at least near them)

Mood lighting. Try a sega Homestar planetarium projector

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Long distance hot video chat with mutual masturbation.

Sex on the dining room table

TENS unit - electro shock

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Sex with good friends but not lovers. Keeping the balance is tricky.

Meet other couples through a Lifestyle website.

A sexy walk in the park at night, when nobody else is around

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Golden shower

Food play (sploshing) - including washing her off in the kitchen sink.

Short (5 minutes or less) quickies

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Outdoor sex under the real stars

Scented massage oils

Prostate massage.

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Titty fuck

“Rescue” sex - partner lets go and is about to do something dangerous but hold them back at the last second. This takes trust.

Write your own sexy truth or dare card games.

Hey girls can we see some anal play?

Forced hydration. Drink water during sex until you lose bladder control.

Canibalism - eat a tiny piece of each other - typically a nip of you ass cheek. This may leave a small permanent mark, but it was in love.

Anal play

Play sexy truth or dare card games.

Couples massage at a spa

Golden enema

Butt slapping as hard as they can take and enjoy.

Take a sensual shower together. Rub your soapy body all over theirs.

Sex in public

Induce squirting with the right techniques.

Sex swing

Hair play. (Cowgirl, brushing her long hair over his skin and face)

Find porn or erotica that you both like.

Snowball - cum inside her vagina, go down on her and suck it out, and then kiss her and shove your own spunk in her mouth.

Sex in a pool

Here is another list

Long (hour or more) marathons

Sex club - watch, be watched or fully participate