This is my experience here also. I was surprised coming here, Brazil and Colombia. Maybe this is a South America thing and not just Argentina. But a few girls that I dated here they didn't make me put on a condom. Whether that is a good decision or not is probably another discussion. You have to figure if they are doing this with me they are with everyone so STD's are a risk. But probably why so many are asking where to get tested for STD's.
Back home there is a clinic I can go and they test free. I try to be careful but it is tough to resist in the heat of the moment!