To add:
To dissuade somebody from spirituality and encourage them to focus on their current goals is not not helping, but helps a lot. It allows people to be clear exactly in their mind on they want and when they are clear what they want, they can move towards getting it. If what somebody wants is sex, then be clear that is what you want, then put in the effort to get it.
This actually plays into spirituality. What is holding us back from the divine is our egoic wants and desires. As long as they are there, the the feeling for the divine cannot arise within us. This is why in the spiritual traditions desire is seen as something which holds us back, limits us, and creates suffering for us(first noble truth of Buddha) hence the ideal state is said to be a state of desirelessness.
And believe you me, I have found the force of desire the hardest thing to deal with in my own spiritual path. It has prevented me from developing further in life. This is why I decided that I needed to work on my desires. Like I said there are two major ways of doing it:
Right hand path: Literally forcing yourself to go in the opposite direction of your desires. It means following a very rigid code of life. The kind of life you would have to lead if you went to a monastery(5 am wake up, fixed times for meditation/prayer, basic, tasteless food, 9pm sleep) No gossip, maintaining silence at most times, no television, no sports, celibacy. This highly regimented life is designed to force your mind into new habits and by doing so the desires within one gradually begin to weaken.
Left hand path: Working directly with your desire and experiencing its result. The aim is to transcend the desire by developing dispassion for it. For example, suppose you have an addiction to chocolate. Then eat chocolate and see how it makes you feel. Then eat another and see how that feels. Then another… and another… and another. Eventually dispassion will come and you will not want to eat another chocolate.
In my experience I have found the left hand path is the most practical way of overcoming desire and it works very well. Deal with your desires one by one, that eventually none are left. I feel like I have come a longer way in my spiritual development by following this path, than I ever did with the right hand path.
If it is the desire of girls that is holding you back. Then get a girl, experience what it is like, and trust me when the novelty wears out you will be thinking to yourself, “Why did I want this so much before” When the realization comes that getting a girl has not really brought you fulfillment, you will develop dispassion for girls. Then your mind will shift to the next desire… and the next… and the next until no more are left to experience.
The left hand path actually mirrors how nature works according to Samkhya. Nature is constantly moving us forward towards our final liberation by producing the experiences that we need or desire. When the soul has experienced it, understood it and developed dispassion, nature stops producing those experiences. This process has been automatic up until the human stage, where the human then takes conscious control of their evolution. Thus it is up to us to carry out own evolution by consciously carrying out the process nature does(really we are just nature personified).