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

Butt slapping as hard as they can take and enjoy.

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

Anal play

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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.

Candle wax play

Sex club - watch, be watched or fully participate

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Induce squirting with the right techniques.

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

Sex in public

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Golden enema

Sex in a pool

Outdoor sex under the real stars

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Mutual massage which may or may not get erotic

69

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

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Mutual masturbation

Sex on the beach

Sex with other couples (or at least near them)

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Long distance hot video chat with mutual masturbation.

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

Sex swing

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Here is another list

TENS unit - electro shock

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

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Temporary body paint

Titty fuck

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

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

Golden shower

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.

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Play sexy truth or dare card games.

Long (hour or more) marathons

Prostate massage.

New lingerie

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

Meet other couples through a Lifestyle website.

Mood lighting. Try a sega Homestar planetarium projector

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

Nude co-ed sauna. (Russian banya)

Write your own sexy truth or dare card games.

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

Hot tubs

Find porn or erotica that you both like.

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

Couples massage at a spa

Sex on the dining room table

Scented massage oils

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

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

Short (5 minutes or less) quickies

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.