You may give feed back on
what your andrologist advises you.If he says everything
is okay. you may go for few exercises like male deer exercise, kegel exercise, Uddian Bandh (navel energy yoga lock). Google these words and learn the exercises and practice them regularly. Sat kriya is also a good yogic breathing exercise to boost up your sexual health. You may do all the exercises. Each exercise will work energetically to enhance your sexual vigor.