I've got a 6 and a half year old female short haired moggie. She was a stray when we took her in,aged approx. 4 -5 months,just over 6 years ago. Had her neutered about 2 weeks after we got her. She's mainly an indoor cat,as I live in a flat,but she does have access to a balcony in decent weather. She's always been a bit 'hot and cold' temperament wise,going from being extremely loving and affectionate,dribbling all over you and kneading like mad,to being stand-offish,and occasionally behaving like she wants to kill me,hiding and pouncing on my feet. We took this all as normal cat behaviour.
But just lately,she's started doing something that she's never done before,I've actually never witnessed any cat I've had do this. If I lay on my bed,she jumps up beside me and positions herself alongside my leg,then lifts her bum right up (facing me!),to the extent that her back legs are standing up,lifting her tail as she does so. All the while she's doing this,she's purring like mad and pushing herself against me. It's like the behaviour of a cat in season,but she's been neutered! She's only been doing this for the last 2 -3 weeks. Does anyone else's cat do this? And do you know why?