the bareback scenes have been increasing i think for both groups.

This seems true..

Still, most straight porn I watched rarely have condoms in it. Vaginal/anal intercourses still presents big STD-risks for those actors/actresses. (even if they're tested regularly, if they had an anonymous gang bang the other day, get tested the day after & come to the studio with the result, they'd have a great risk of transmitting any diseases.)

Being tested the day after is often ineffective because of the window of contraction… It takes approximately 2 weeks to 3 months to reach the point of seroconversion, so getting tested right away the day after isn't a good plan sadly...

In most cases, the point of seroconversion will occur within 2 weeks, but in rare cases, such as the case of an elite controller or progressive developer, it can take up to 6 months for HIV to show up in a blood test. For this reason, it is always recommended to wait at least 2 weeks from the point of contact before getting the test done.