What It Is: Lastics is a stretch workout, which can be done in class or at home. "We start standing, warming up by stretching the back, hamstrings, arms and abs," explains Lastics founder Donna Flagg. Then the workout moves through seated and supine positions, targeting each muscle group along the way, from hamstrings and inner thighs to feet, chest, shoulders, arms, obliques and more.

Bedroom Benefits: Deep stretching "connects you to your body in a deep and visceral way, which enables you to know your body better, giving you more confidence using it in intimate situations," says Flagg. "That gives you a sense of freedom [in the bedroom]." In particular, Lastics gives you better control and mobility of the pelvis and more flexibility in the legs, helpful for all those repetitive pelvic motions required during sex.

Who Should Do It: Flagg says Lastics is best suited for people who are active or want to be more active in their everyday lives. It's also great for people who "experience discomfort from muscle tension and tightness."

What It Is: The Prime Workout is a 15-minute strength-training workout developed by celebrity fitness trainer Jackie Warner, aimed to sculpt the shoulders, back, abs and glutes to create the ideal female proportions. That's an hourglass figure, where the shoulders make a perfect V-shape toward the waist and out again at the hip. This workout specifically targets the relevant muscle groups -- click here for a full play-by-play of the workout.

Bedroom Benefits: According to Warner, studies show that men tend to be attracted to female bodies with a low waist-to-hip ratio -- meaning one with a healthy amount of body fat. Sculpting the muscles to create that ideal hourglass proportion triggers a biological reaction in men (and women), making them want to race you to the bedroom, says Warner in her new book, "This Is Why You're Sick and Tired," where you can also find the workout.

Who Should Do It: Having skills and confidence once you're already in the bedroom is one thing, but attracting a partner to get there is another. This workout is for women looking to physically sculpt their body and boost their confidence to look and feel more attractive to sexual partners.