Of late my desire went down hill. Even if i had an erection, it won't stay for long. Sometimes it goes soft after entering in to the vagina. And i am getting excited at wrong times, mornings, afternoons and evenings but not nights, when the possibility of having sex is very very less. I have a feeling that my sperm quantity may be less. I became a little overweight. Is that a reason for my reduced sexual desire? We are planning to have kids, and this is making us worried. Kindly advice treatment for this. Thank you.