Quick summary: Sex has a positive impact on stress and yet stress has a negative impact on sexual frequency and desire. I have two suggestions: one, intentionally engage in practices that reduce the distracting power of stress so that you and your partner are more able to focus on the potential of sexuality in the moment, and two, allow your insight and knowledge of the relationship between sex and stress to serve as a motivator to initiate foreplay so that the resulting sex can help you to manage your stress. Either way, increasing sexuality in a committed relationship has been researched to be linked with decreased stress (an incidentally, an increased immune system). If you look at what chemicals (I will be calling hormones and neurotransmitters chemicals for simplicity) are released in the brain when you take anti-anxiety and/or depression medications you will find that your body naturally releases many of the same chemicals during sex (and exercise and unfortunately when eating high calorie foods – this is why we crave items that are not in the best interest of our bodies – increasing calorie intake was historically necessary for survival – now the opposite is often true, but our biology has not changed). Sex does not have all the side effects of medication such as a reduced libido. Sex in a committed relationship (yes the improvements are more significant in a trusting relationship… some of the positive chemicals are not released simply do to orgasm) has a wide range of positive impacts.