I don't know what causes them to be attracted to leather flying jackets, but a lady friend's cat would always make a bee-line for mine if I left it lying around, then burrow around in it to make a nest. As would the moggies which used to live in the South Warks Flying Club crewroom.
I guess that my leather jacket can therefore be described, with some evidential justification, as a 'pussy magnet'?