Hello young man, Thanks for using healthcaremagic. Note one thing that most of the men do not have straight penis like pipe but it is some what curved like banana in erect position. This shape not cause any problem during masturbation or intercourse.And it is natural shape, not happened due to masturbation. If curve is more than 30 degree and causing pain after erection, it may be Peyronie s disease. But in your case it is not so. Young man, there is no need to stop masturbation habit as it is not harmful but it is natural. Note carefully whatever I am going to explain. Normally after age of 13 or 14 almost all boys enters in to phase of adolescence. In this phase testosterone secretion increased, beard mustache growth started, hair around genitalia started growing and adolescent boys attracts towards opposite sex and gradually learn masturbation(excitation and ejaculation by sexual thoughts though rubbing penis by own hands). Your habit of masturbation is not bad at all until it s compulsion. As most of the young man like you do masturbation(almost 95%). Frequency of masturbation varied from once in a day to once in a week individually.You should not suppress your desire. So just understand this physiology of body . Now density of semen. If your masturbation frequency is daily your semen density will be thinner.If you masturbate between 3-4 days gap, density will be thicker.However density has not much to do with sperm count as density depends on mucus and fructose of semen which is produced by prostate. I hope you can understand now that there is no treatment needed for straightening of penis as it is normal. And for density you can go for semen examination for your assurance. Hope I have answered your query.late me know if still any info needed. Regards, Dr. Chintan Solanki