And doxycycline is a PEP treatment, not a PrEP treatment; respectfully you should probably take a step back from conversations where you obviously aren’t informed about the basics.
Not speaking about LGBT related matters; Sex without condom is just like everything else - it depends on the person. For some people there is little to no difference. For others, wearing the condom removes all sensation, reducing the act to physical exercise. So is sex without condoms worth it? For some people, yes, it is.