Dani Katz is a writer and Tantric healer (aka Tantrica) who works with penises, sacrums and chakras to help men become more open to receiving sexual energy. She has great insights to what's going on in the body during sex and erections (or lack thereof), and provides masturbation tips galore, such as changing angles or grips, focusing on physical sensations over sexual fantasy, easing back on porn consumption, and taking breaks from masturbation altogether.  Enjoy!