First some background....I discovered this anon, no loads refused urge by chance. When I look back, I was always mixed about it. Slightly turned on by the excitement, yet totally turned off at being fucked by someone I wasn't into.
Until one evening I was at a CumUnion party at Steamworks, the day before IML was supposed to start (In Chicago). I was in a jockstrap, just carrying my towel, standing outside a room watching three hot, muscular guys fuck and fist. At some point, someone came up behind me and started playing with my ass. To be honest, the only thing I was focused on was what was going on in front of me. I appreciated the attention and I think I instinctively pushed my ass out a bit, and before I knew it, the guy was pushing into me.
I didn't resist...because well, there were people around. i didn't want anyone to think I was a prude or anything, lol. So I took it and he shot his load in me. As soon as he pulled away, another guy stepped up and proceeded to dump his load. 3 more guys did the same thing and a crowd had gathered trying to watch. We were blocking the hall and clearly people were getting upset with that so the crowd had started to be broken up. After the 5th one, no one immediately came up so I stood up straight and stretched my back a bit. A guy who'd been watching leaned into my ear and said, "You're VERY generous". I just laughed and it took me a bit to figure out what he meant. I'd assume one or more of the guys were "less than desirable looking". Honestly, it just turned me on even more.
I realized I'd just put on a show in public and had taken 5 loads in no time at all. Getting five loads in a hotel or in my house would've taken hours to set up and arrange and I probably would've had to talk to 20 people online in the process. This was simple!!!
So since then, my preference has always been to be as public as possible. Not just for my exhibitionist side, but so that people can see that I'm a cumdump and that they don't have to talk to me or "ask" before they breed me. If anyone gets annoying, tries to use a condom, or whatever, I just relocate. We have several raunchy bars in Chicago which are good for this type of action, plus a couple bathhouses. Not to mention traveling around the country to various gay events (Folsom, Southern Decadence, various pride celebrations, etc)
It's possible this could help with your anxiousness. In a situation like these, there are plenty of tops available, thus you can easily take 10, 20, 30 and more loads in one night! You get to choose when/if you want a break and there's no disappointment, the tops can just move on to one of the many other bottoms around. Plus, in these situations you have all the sights and sounds around you of men fucking everywhere. That excitement is just more motivation for me to want to be a part of it and take every dick and load that I can.
As far as keeping all the loads, it'll definitely start to get fucked out of you. When I manage to stay in one spot for several hours, I'll end up with a puddle of cum underneath me along with cum down my leg and in my socks if I have them on. So if you want to keep all the loads in you, you'll have to limit yourself as it starts to spill out.
Last, as another poster mentioned..health. When you spend 3 to 5 hours in a bathhouse or sex club taking any and all anonymous loads, chances are, you're going to come away with something. I just have a routine of getting checked sometime in the week after these events. Depending on where you get checked, a lot of places will treat you for gonorrhea and chlamydia based on your "presumptive exposure". Occasionally you'll have to go back to get shots for syphilis as well. When I keep these habits up, I generally avoid experiencing the symptoms. I've just kinda accepted that I'll get things, I just choose to not be the one to spread them any further.
This was long, but hopefully good info for you. If you have other questions, don't hesitate to post them!!!