I think that the causes are bad nutrition, obesity, stress, and lack of exercise.
Following Are Reasons
1dibetes
2over sex
3,alcoholism
4drug addicts
5,blood pressure
Fast paced life, stress due to competitive state of life, and improper diet. These all are part of today's life. No one can get rid of it. With proper understanding and right approach to the life, one can minimize the stress. Everything else depends on medicine. Viagra Generic Sildenafil Citrate can definitely help you to have better sex life. Sildenafil Citrate is available at emedoutlet.com with 15% discount coupon 5234E and Free Shipping with 4848B.
It could be a temporary case of it which can be put down to nerves and pressure of having sex at such a young age. You may not be ready for sex yet or you may just need to keep practising until you feel comfortable. Once you get over that, then it just comes naturally to you.
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Technology, perhaps. I know its not that fantastic for you to sit around with your laptop on your lap or your cell phone in your pocket all the time. They are constantly sending out signals and radition, and its been proven that they can cause people to become infertile and stuff.