Husband has dull pain in perineum after ejaculation. has had on and off perineum pain when not ejaculating, too. burns when he pees but only after drinking alcohol. any ideas on what this could be? could it be affecting fertility?

Genitourinary pain can be caused by infection, trauma or other possible causes of inflammation. It merits an urgent visit to one's doctor or to a urologist. A careful history and physical exam, with a urinalysis and blood tests including a CBC, kidney tests and PSA (prostate specific antigen) will usually reveal the likely cause and appropriate treatment.

Sounds like prostatitis. He should be examined by a Urologist. It may temporarily affect fertility if it is an inflammation