In Tokyo's Hibiya Park, just by the Hibiya gate entrance, couples can often be seen laying claim to benches surrounding a large fountain.
As intimate as they look, however, their relationship is still in a nascent stage, explains Isoya Shinji, a self-styled expert on lovebirds' behavior.
Look at the flower garden, he says, that's where you find couples at a more advanced intimacy level, physically and mentally. More private and romantic, the garden has an inherent lure for those already at ease with each other. More passionate mates find their nest in the hilly bush behind.