The BBC’s great explorer Simon Reeve doesn’t like the word “adventure”. He pulls me up a couple of times over lunch when I use it to describe his trips up the Congo river, or into the Kalahari desert. “Forgive me, Tim,” he says, “but adventure is a kind of loaded term” – too many intrepid personal heroics, not enough culturally sensitive traveller, I guess. He thinks a “search for experiences” better describes his one-man quest to bring the world’s four corners into British living rooms. “As a species, we have a constant need for encounters and food and smells and sights that tweak our buttons,” he says. “We’re wired for new experiences and without them we sink into mental slumber.” His expression of this philosophy, in London restaurant terms, is Jacuzzi, on Kensington High Street, three lunchtime floors of extravagant indoor vegetation and Italian high camp, a little like unexpectedly encountering Bruno Tonioli bearing a tray of canapes in a jungle clearing. Reeve has chosen it for our lunch for a few reasons. One because …