And to lighten up: " ... the average sex session in the UK lasts 32.5 minutes and therefore burns 179 Kcals. Men from Bristol topped the charts with an average 44 minute session and 242Kcals burnt, with Cardiff ladies taking the lead for Women and clocking up an exhausting 78 mins and 429Kcals burnt per session. " Anyone spot a posiibly intriguing discrepancy here?