The short answer is yes! When a male is sexually excited his penis will get hard and erect. If he is close to a female’s vagina (touching, part way in, all the way in) he could get her pregnant because when his penis is erect he will not necessarily be aware that some semen could being released. Even a little bit of semen (the male’s fluid) has sperm in it, and sperm is what can make a girl pregnant.
I’m sure you’ve probably heard people say, “Use a condom every time you have sex.”
You may think that condoms make sex safer, but research shows that’s not the case. Condoms used to prevent pregnancy fail in about 14% of couples in the first year that they were using them. Even if a condom is used every time, it can only reduce your risk of getting a sexually transmitted infection, but not eliminate the risk.
The truth is, even if you use a condom every single time you have sex, you’re still at risk for both pregnancy and STIs. And up until right now, there is no evidence that consistently using a condom during oral sex will reduce your chance of getting most STIs, including HIV.