When asked by customs agents, "what were you doing in Juarez/ anything to declare?"
Appropriate responses:
"Visiting with the local sweethearts and single mamacitas."
Or
"Dental work at Apple Dentistry"
Or
"Saving ladies the Visa card fees."
Or
"Getting Fucked and Fed."
Or
"Paying tariffs upfront."
Or
"Contributing to Mexicos Gross Domestic Product."
Any of these work, they have worked for me.
You are most definitely welcomed.