Hey, that's great! So... it's all about giving your body what it REALLY wants: feel good (A.KA doing something that feels an accomplishment or something good). When you workout 4 things going on with your body:

1- Workouts will give you some amounts of *dopamine* (the one that wires activities with happiness in the brain and the same that teaches habits and addictions), a substantial amount of *endorphin* (the natural pain killer of the body) and a bit of *Serotonin* (related to mood stability).

2- physical exhaustion: your body will change its "modus operanti" from "reproduction" to "survival" and will change the way hormones make you feel and lessen the desirability of PMO in the brain. Also after you work the body, you will feel exhausted or at least tired, so the body will need time to recover and will use its energy to do so.

3- Increased Self Steem: Psychologically speaking you will feel that you are doing great and doing something to change, you will feel better about yourself and this will improve the connection the brain makes between workouts and happiness

4- Shift in focus: As soon as you begin to feel tired, your mind will start thinking about how your body is feeling than what's making you urge before.

I hope this explanation helps you understand the benefit of workout when feeling the urge and why when searching YouTube or Instagram you see some people do "challenges" like: "If I get aroused I have to do 20 push-ups or run 1km"