Masturbation is a great form of #selfcare that is fun, healthy and cheap!
In keeping with the theme of mental health it is also important to point out that masturbation can cause issues for some people. I often ask clients three questions which allow me to gain an understanding as to whether support is needed: 
Can you cut down on your masturbation? Is it having a negative effect on your life and relationships? Do you feel shame/guilt following masturbating? 
If none of these apply to you then happy masturbating! Otherwise there are many specialists out there that can support you.