I’ve engaged in sexual activity with other people in the past. I met a guy in January and I’ve only engaged in sexual activities with him since we met. We have had oral and vaginal sex at least 10 times. Never has he complained of any discomfort. We had sex and oral on Friday, August 3rd and we did it again the following week Friday, August 10th. I’ve only been with him sexually. There were no other men involved. He began complaining of having discharge coming out of his penis, urinating often, and feeling weak. Is it possible that I’ve given him an STD after we’ve had sex so many times and he didn’t have any complaints, plus there was no other man involved since I met him?