What kind of backwards bull is this?
Argentina does not have a close-in-age exemption. Close in age exemptions, commonly known as "Romeo and Juliet laws" in the United States, are put in place to prevent the prosecution of individuals who engage in consensual sexual activity when both participants are significantly close in age to each other, and one or both partners are below the age of consent.
Because there is no close-in-age exemption in Argentina, it is possible for two individuals both under the age of 18 who willingly engage in intercourse to both be prosecuted for statutory rape, although this is rare. Similarly, no protections are reserved for sexual relations in which one participant is a 17 year old and the second is a 18 or 19 year old.