Dear service user, Thanks for writing to healthcaremagic. I read your question and understand that there is remarkable decreased desire for sexual activity for last couple of months. I admire you for your frank and honest attitude for sharing your problems regarding relationship during your teen. Let me tell you that sex is largely everything what happens between your two ears (Mind) and little something what happens between two legs. I mean that when your mind is emotionally disturbed, you will lose sexual desire and also unable to perform. Sexual dysfunction or diminished desire is one of the symptoms of depression. It is treatable illness and there are effective medicines. You expressed concern regarding small penis size. The width and length of penis vary from one individual to another. The normal length of vagina is about six inches. Only outer one third and the front wall of vagina have nerve fibers and hence sensitive to stimulation. Rest of inner two third is largely insensitive. So if you want to arouse your partner during sex, you should focus on the areas of maximum nerve endings hence clitoris and inner lips or labia minora, the outer wall and outer two third of vagina. So for female sexual gratification, the size of erect penis could be anything from two inches or more! You remember that what important is strength and not the length! Masturbation in private or with a partner is generally considered a normal and healthy part of sexual enjoyment. Masturbation is not a disease hence no adverse effects. Masturbation causes impotency is a myth. To help you best, I advise to see a psychiatrist who will help you to come out of this troublesome phase. I hope this will surely help you. Feel free to ask anything again if you have any queries. Warm regards.