Trying new things in sex prevents boredom in one’s sex life. If your wife doesn’t like to spice up your sex life, you could both visit a sex therapist to know the advantages of keeping things interesting between the sheets and during the day. Women tend to get bored of sex sooner than men do so before visiting a therapist, try talking to her to find out why she is averse to trying new things during sex. However, it's very important to ensure that your wife is comfortable with new practices. Remember that for women, sex isn't just a physical release but a feeling of emotion and love, and that's what matters the most.