**ALL ROUND PICTURES FROM SOLARPIX.COM** ** UK NEWSPAPER PUBLICATION PERMITTED ONLY AFTER 7 DAYS FROM THIS CAPTION DATE**. ** NO PUBLICATION IN AUSTRALIA, BELGIUM, FRANCE, GERMANY, ITALY, SCANDINAVIA AND USA** Caption: Zookeepers at ZSL London Zoo spiced up Valentines Day for Sumatran tigers, Raika and Lumpur, with hearts doused in the animal’s favourite perfume : CK Obsession..The loved-up pair were given the romantic treats as part of their daily enrichment activity, stimulating their keen sense of smell and encouraging their natural behaviours..Zookeeper Teague Stubbington said: “Tigers are territorial creatures and these strong smells encourage their natural scent-marking behaviours by making them rub themselves against the perfumed hearts. .“We’ve tried lots of different scents and spices, and CK Obsession has proved by far to be their favourite – it always gets the strongest reaction.”. This pic: JOB REF:14470 SFE DATE: 13.02.2012 **MUST CREDIT SOLARPIX.COM OR DOUBLE FEE WILL BE CHARGED** **MUST AGREE FEE BEFORE ONLINE USAGE** **CALL US ON: +34 952 811 768 or LOW RATE FROM UK 0844 617 7637**