Hi Doc, My boyfriend of 7 months who is 40 years old is having penile discharges.All our std test have been negative. This is the second time he has complained about this since we ve been together. It s not smelly, not itchy but its just a milky discharge. We are very worried what do u think is the cause. It showed up this last time a few days afer we had sex. Just to mention, he constantly wears tight underwear, and he is currently under a bit of stress as he is changing jobs.he is a primary school teacher. Please what can we do next? Thank you for your time and advice. You are doing a GREAT JOB!!!!!!