There's a key to hitting on just the right gift for your partner: Know them well. This is especially important when you plan on putting a sex toy or other erotic product under the tree. After all, to the right person, a super-sized anal plug might send just the right message; to another, it might elicit a horrified gasp followed by stunned silence and, in the absolute worst-case scenario, anger. Which hardly makes for a warm, happy holiday moment. Sex, after all, is a very personal thing, which means people tend to be a little touchy about it - especially if it's kinky.

But let's suppose that the moment is right, that you already use sex toys in your relationship, or that your partner has dropped a hint about what they'd like. Or - better still - maybe you've already talked about and agreed to trying something new. What to buy? Here are a few top-rated sex toys that shine as gifts. Consider this a bit of a sexy holiday gift list.

For the New Sexual Adventurer

Perhaps you and your partner have discussed spicing things up, but are just dipping your toes into adult products. May we suggest something like a massage candle?

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

Candles are a nice way to set the mood for sexy time and this one from JimmyJane also doubles as massage oil. Light it up and use the easy-pour spout to apply oil to your partner (check the temperature first!) for a sexy, scented start to play time.

An Indulgent Pleasure Set

Great sex is all about sensation and anticipation. The Indulge Me Pleasure Set from LELO offers both. It includes a blindfold for sensory deprivation, a feather tickler for sensual tickling and play, and a NOA silicone couples' massager for the big finale!

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

A Restraints Kit

Bondage is huge. Whether it's "Fifty Shades of Grey" that unleashed this beautiful beast, or something else entirely, many couples are also tying each other up - with very sexy results! One great way to get into bondage is with a restraints kit like this Fifty Shades Hard Limits Universal Restraint Kit. This clever set of restraints slides under your mattress, turning any bed into a safe, simple and secure restraint system.

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

LUBE!!!

OK, so maybe lube isn't THE gift, but it does make a great stocking stuffer (pun intended!). Plus, if you're looking for something simple and inexpensive that'll improve your sex life, this is it. If you're looking for a simple sex lube, try water-based. If you need something longer lasting, want to use it in the shower, or are into anal sex, check out silicone lubes. You can even create new experiences with flavored or warming/cooling lubes.

A Clever Collection of Vibes

Two vibes are better than one, both in terms of value and pleasure potential! The Je Joue Ooh Vegas Collection includes a cock ring, a G-spot vibe and a powerful motor designed to power either one. It's a great toy - and a great value for a two in one.

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

Another great option is the We Vibe Dreamy Desire Collection. It includes two of We Vibe's most popular vibrators - the We Vibe Touch clitoral vibe and the We Vibe 4 Plus, a couples' vibrator designed to be worn during intercourse - and can be controlled by a remote app!

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

A Vibrating Cock Ring

Cock rings are one of the simplest and most popular sex toys for heterosexual couples - and for good reason. By providing vibration to the clitoris during sex, they can help take both partners to O-town. The LELO Tor II is a better version than most. It's made of body-safe silicone, is fully waterproof and includes a powerful motor that both partners will be able to feel.

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

A Harness and Strap-On Dildo

Whether you're looking to enjoy penetrative sex with a same-sex partner or try pegging, a strap-on harness and dildo can add a real sense of adventure. When it comes to harnesses, Tantus does it best. Try the Bend Over Beginner Kit. It includes a comfortable harness and two compatible silicone dildos - one larger, one smaller.

8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)

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8 Amazing Sex Toy Gifts for Couples That Keep on Giving (and Giving, and Giving ...)