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

Titty fuck

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

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

What are some ways to improve speed in sprinting, running uphill, and long/middle distance running?

Sex with other couples (or at least near them)

TENS unit - electro shock

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

Why doesn't speeding significantly decrease one’s commute time? I've done a lot of road trips and driving and have experimented by increasing speed by 10–20%, but somehow this never equates to arriving 20% sooner, even on clear roads.

Long (hour or more) marathons

Sex in a pool

Sex in public

How do military families handle communication when a service member is injured overseas?

69

Sex swing

Long distance hot video chat with mutual masturbation.

Why did Obito, a supposed "bad person," do good things for Kakashi?

Sex on the beach

Outdoor sex under the real stars

New lingerie

Why does my cat get anxious during loud noises like thunderstorms or firework displays? Is this a common behavior for cats, and is there a way to help them cope with it?

Golden shower

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.

Sex club - watch, be watched or fully participate

Why do guys have better skin than women even though women use more product?

Mood lighting. Try a sega Homestar planetarium projector

Candle wax play

Mutual massage which may or may not get erotic

What are the basic human needs according to psychology? What are the consequences of not meeting these needs?

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

Nude co-ed sauna. (Russian banya)

Butt slapping as hard as they can take and enjoy.

Time (physics): Who started counting our current time or is it just "set" by some scientific measure?

Meet other couples through a Lifestyle website.

Mutual masturbation

Find porn or erotica that you both like.

While on the surface of the moon, why isn’t the Apollo 11 spacesuit inflated like a balloon from the 3.7 psi internal pressure?

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

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

Scented massage oils

What is the dirtiest city in India?

Play sexy truth or dare card games.

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.

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

Anal play

Here is another list

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 on the dining room table

Prostate massage.

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

Couples massage at a spa

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

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

Temporary body paint

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

Golden enema

Short (5 minutes or less) quickies

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

Write your own sexy truth or dare card games.

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

Induce squirting with the right techniques.

Hot tubs