I enjoy masterbaton thruoghout the day but i feels like it may drain my energy afterwards is this actually happening or is it just in my head?

Sex Response Cycle: Ejaculation for men does tend to drain energy for a little while, that's completely normal and why men often fall asleep after sex. This is called the resolution phase of the sexual response cycle and is associated with a drop in blood pressure, and the penis decreases in size. Women respond differently in this phase and are capable of multiple orgasms.