I used to sleep like this, both hind legs hunched up...
They glare, but they love.
I could tell you about Isis' shameful love of a particular man's extended leg, or Chazz's inability to control his lower hindquarters when he witnesses said encounter...but I won't. I mean, after all, they are both spayed/neutered. As a witness, I'm here to say that apparently, you just can't fight that feelin'.
In any case, here they are, looking very reserved, indeed...(well, except how Chazz has his junk situated just above the Lion's head, which he then proceeds to sit directly on, in a really funny and inappropriate shot...)
And btw, I ADORE sleeping with Chazz; he burrows for the whole night, only occasionally waking you with his panting. Pics to come, but SO CUTE.