I've been up and down- some months I would rather have worn steel wool undies than dtd, while others I was jumping DH as soon as he walked in the door.
Now that I'm on the home stretch, I quite like the idea- it's just I have to time it so I'm not exhausted, he's not exhausted, he's not running 15km the next day (groan!) nobody's staying over... that said, we've managed it quite a few times.
If only it weren't akin to a geometry exercise...