In many cases, it's possible to improve your bed's suitability for sex without buying a new mattress. The first step is to establish why you don't like the way your current mattress performs during sex. Some potential pitfalls include lack of bounce and difficulty moving, insufficient cushioning and traction, overheating, poor edge support, or excessive noise. You can resolve many issues by tweaking your bedding or bedroom environment, or by purchasing a mattress topper to modify the feel of your bed's comfort system. For example, if you suffer from overheating during sex, try using lighter bedding, setting your thermostat a few degrees cooler, or using a fan to circulate air near your bed. If your mattress is too firm or too highly contouring, consider using a mattress topper to change the firmness. Issues with noise and instability may improve somewhat if you set the mattress on a sturdy foundation. Edge support is harder to fix, but you can try rotating your mattress from head to foot to reach areas of the bed that have not been subjected to as much wear and tear. As you make adjustments to your mattress setup, remember that your bed also needs to be comfortable for sleeping. If you sleep with a partner, you may want to lend more weight to issues such as motion isolation and noise.