Night falls are a natural phenomena.  But when we start having night falls more than 4-5 times a month, then there is a problem. We start feeling weakness, tiredness, etc.. Do not take milk after 3 pm. Try to avoid non-veg, spicy, fried & chilly food. Do not watch pornography materials. Take good healthy diet, do exercise & yoga daily. Take tab. Confido & chandan adi bati each morning & evening with water. Keep stomach  clean & avoid constipation.

Masturbation doesn't causes any weakness or sexual dysfunction. Don't worry its a natural phenomenon and mostly its the lubricating fluid that comes out. Take healthy diet, excercise regularly and remain stress free.