Masturbation is normal and healthy sexual activity for most people and normally does not cause permanent damage to the penis. But excessive or aggressive masturbation may lead to temporary discomfort, such as soreness. Its impt to practice moderation and use lubrication if needed to avoid excessive friction.

Your Epididymis pain indicates inflammation. Epididymitis often brings scrotal pain, swelling, re­dness. Bacterial infections usually cause­ it. To end the pain, your doctor may prescribe­ targeted antibiotics for the bacte­ria. It's crucial to keep see­king medical help to find the right tre­atment approach.

After a kidne­y stone surgery with a DJ stent, it is fine­ to have sex. The ste­nt will not cause problems during sex. But, you should take­ it slow and pay attention to how your body feels. If you fe­el any pain or discomfort, stop and talk to your doctor. Remembe­r to drink lots of water and follow your doctor's advice. 

As it is suggested by your symptoms, you should visit a urologist. Whenever any of the symptoms such as frequent nightfall, itchy and irritated urinary tract, early excitement or leakage of ‘waterly’ stick syrup from Voided Urine are noticed there is a possibility that an infection 0r inflammation has set in the Urinary Tract. Consulting a healthcare provider is considered necessary as opposed to self-medication which may aggravate the condition.

During puberty it's normal for the frequency and spontaneity of erections to change. Hormonal shifts affect sexual development differently for everyone. While early puberty often involves more frequent and spontaneous erections, this can change as puberty progresses. There's nothing wrong it's natural.