question: I had a sexual encounter for the first time two years ago with a gay person and they was no penetration involved,we rubbed our genitals together and two day later i woke up with a tingling and itchy sensation on my penis shaft and scrotum i have been going for hiv tests they have been negative took antibiotics for other stis but the itch still persists,i have no rash discharge,pain or sores what could it be