Has anyone had sex before the 6 weeks?

No judgment.. but has anyone had sex before the 6 weeks after having their baby? I know there’s a risk of infection, but what exactly would cause the infection? Would using a condom cause infection?? This is my 2nd baby and I waited 6 weeks with the first cause I had a 2nd degree tear, and this baby I don’t have a tear and I had her completely natural! No meds or anhthing. And I just feel like I took a walk in the park for being almost 3 weeks pp.