Hey there,
This is sort of an unusual question, but I worry a lot and I'm going to ask it.
I had this girl perform unprotected oral on me (I'm a male) a few times over the course of a night. I went to visit her at around midnight at her place. She tells me that she is a virgin, and has only given oral sex to 3 guys in the past.
Earlier that day, she told me that she was having a friend over around 5 PM, and I think he left around 9 or 10 PM, but I'm not sure.
It turns out she hooked up with that friend earlier in the day, and I'm almost certain she also gave oral sex to him.
Is it possible that his semen in her mouth could give me STDs if she sucked on me a few hours later? Wouldn't the saliva/bacteria in her mouth, change in temperature, her probably swallowing most of it, and her breathing air on it kill everything in it? Is it possible to get HIV this way, or any other STDs?
Also, what STDs should I be looking out for with oral, and whats the window period here?
Thank you for all of your help! I really greatly appreciate it!