Masturbation

So I'm 15 and I masturbate.but the first couple times I did it I felt guilty and I don't know why. I think it might have been because I've grown up in a religious household all my life, but I would really like to be comfortable with my body. I've actually noticed that since I've started masturbating, I've felt way more comfortable in my own skin and happier. I know this is a weird question but what are your thoughts on masturbation?