I'm not an expert but basically these types of drugs makes your brain a lot more malleable plus they make you happy. The combo of both effects means that all the good experiences you have while high becomes part of you, just like some old happy memories of your childhood. It also helped me a lot in my life, especially socially. I needed drugs at first to feel comfortable going out but now I have so many happy and relaxed memories of going out with friends under the influence of mdma that I don't need drugs anymore to feel the same way. And I heard the same type of stories from many friends. I'm hopeful for the future of mental healthcare with all these news.