I love slings. There's something so incredibly hot about heels to heaven and ass open for anyone that wants it.
The last time I was in a sling, I wound up getting fucked until I had to come, so I jacked it into my hand and slicked up a top's cock before he stuck it in me. So fucking hot.
I'm going to have to remember that trick.
Well, I'm also going to have to get a fridge/freezer for my room: I don't know how my rather prudish roomie would feel about trays of cum in the freezer.
Most I've ever taken in one session is 12, with a total of twenty-something if you count the whole day.
One of my friends is trying to set up a session where I can get at least 25 in a single session, preferably as many as fifty loads in one afternoon/night.
For me it's two-fold: I love the feeling of being filled and taken, of not having control of my hole; then, too, I love knowing I'm giving someone else pleasure. When they blow their loads in my ass, it means I've done something right.