I'm giggling as I read most of these because I sleep with a plug almost every night (since Sept. 2010). Because of my schedule, it's more convenient for me to just leave it in when I go to bed. It's all about having a safe and comfortable base. On rare occasions that I'm trying to work-up to a newer and bigger plug, I'll sleep with a plug with a 7/8" neck diameter. 98% of the time the neck is only 1/2 inch. I've never "lost the seal" and shit myself. I've never shit in my sleep anyway. I wouldn't even TRY to sleep with one that I even THOUGHT might get lost inside.
I only use water based lube like Astro Gel or Liquid Silk. But I usually use a steel, glass, or ceramic plug so there aren't friction issues. Sometimes I use the Gel for insertion, clean off, and then put a little Liquid Silk around the base because it doesn't get sticky.
The ONLY issue I have had is gas pressure.
I have learned that curved plugs (like Njoy) are easier for dealing with this. Tilting my pelvis and putting pressure at the rear of the handle does the trick and keeps the plug in. BUT, it's IMPOSSIBLE to fart silently with a plug!
Long term wear is my thing. It's my hometown in the sex toy world. It is what brought me into the Eden Community and it is my only contribution to it. For now.