Well if you’re going to smuggle an illegal substance through customs, would you want to do it in a country where you’d have a fair trial, laws similar to the UK and adequate legal representation? Or in a country where you’d be stuffed in a cell for 3 years before getting anywhere near a judge, with rats, cockroaches and 27 others, all jostling for floor space, in a country that still has the death penalty?
I’m on Fluoxetine which have saved my life. I think it’s really fucking stupid to piss about with illegal substances that haven’t been prescribed, but that’s down to personal choice, so long as what you do only harms you. But if someone I was going on holiday with told me that they were going to do something as monumentally stupid as trying to smuggle anything through customs, then I’d be getting an earlier flight there, so I’d be well past Customs by the time they arrived, and an earlier flight back and I’d meet them at the hotel (actually, I wouldn’t be going anywhere further than Cornwall with them, but I suspect you won’t want to give up your holiday).
They search for everything. Literally everything. Drugs, money, animal products, ffs, there are some countries where carrying an apple from your in flight meal could get your bags searched. I remember seeing a Customs exhibit once where they were showing things that had been confiscated and there was a scarf that had been made with wool from an endangered animal. It just looked like a nice scarf to me. So if they’re picking up on those things, what makes your partner think that they won’t notice illegal drugs? Does he think anyone will just assume he’s just brought his breakfast ingredients with him? I don’t think your partner is bright enough to go abroad. He’s a bloody idiot.