Overview
- Dr Naomi Middleton says living together, close contact and shared routines can increase microbiota diversity and support digestive wellbeing.
- A single 10‑second kiss can transfer up to 80 million bacteria between partners, potentially shaping a shared oral microbiome that influences the gut.
- Survey data reported across outlets indicates couples average about five kisses a day, typically lasting around eight seconds.
- Regional patterns cited include Welsh couples averaging 42 kisses a week and Londoners recording the longest kisses at roughly 15 seconds.
- Middleton encourages shared meals to help synchronise digestive patterns and metabolism, while Yakult’s Dr Holly Neill notes close contact may ease stress and affect bacterial balance.