For all of the articles about traveling long term, and the packing lists, and the ultralight “I only carried 15 pounds down the entire Appalachian Trail” bragfests, there’s not a lot of outright discussion of safer sex.
It seems like at least half the residents of any given hostel are flirting with each other over the communal dinner table, and a lot of traditional backpacker activities (heavy drinking in local pubs, engaging in adrenaline-raising hikes through the Andes) result in the kind of situations where clothes might be shucked and risks might be taken. But none of the discussions about trip safety, either before you leave or while you’re already on the bumpy bus to the Guatemalan border, tend to include how to have the safest sex possible while you’re long-term traveling.