Thats why, if you want the continued benefits of medications, you don't come off them (unless your depression is event related and not chronic/genetic). There are a variety of reasons people stop their meds from misinformation to perceived societal pressure to stop them (even though this is near non-existent nowadays). Also, our societies demonization of illegal drugs and the irresponsible, uneducated associations med fear mongers frequently make between psychiatric meds and illegal drugs. Not that there is anything morally wrong with using illegal drugs responsibly either, although they certainly aren't good for maintaining a balanced mindset.
Most of the time you do not have to come off meds to have a fulfilling sexual relationship for both partners. There are many treatments for this if you are having this problem and it is ridiculous to attach this problem to all users of anti-depressants.
Most meds do not have severe side effects nor any long term damage and I for one sure as hell do want to be on them for the rest of my life. I thank god I am blessed to live in an age where these advanced treatments, while still flawed, exist. If I weren't on them I am near 100% that 'the rest of my life' would have concluded years ago.
Most people, (and almost all people who have no experience with meds or only one or two experiences with meds that happened to go very poorly for them) including myself, at one point go through a period of self doubt, fear, or confusion involving their treatment with meds. After all, the unknown is scary. Most people realize after a month or two that it is silly to be so self conscious or fearful of meds. They realize that the effects of meds are not so horrible or so wonderful as they may have been led to believe and they simply start dealing with the positives and negatives they present.