As far as Fowfers, I don’t think there is any set rule on time. As long as you keep it cradled in the crack of your butt, enough circulation will be flowing. Best to keep it down the middle rather than under a cheek. Your dick will let you know when to let it up for air. I Fowfer almost constantly. Anytime I sit in private I sit on my dick, at work in the car, watching TV and in bed.
As far as devices, there are so many good ones. I think the rule of thumb is buy the products designed and developed here, where we can bitch about them when they don’t work, and improve them with our feedback. AutoExtender, peweights, redi-stretcher and Bib. All of these are good. I am in the process of working with Monkeybar and Monty on some new ideas that will probably be available soon, mostly just improvements on existing devices. The Multi-Purpose Device, or GirthaClamp has a lot of promise. MB is taking his time to get it right. Give us your feedback here:
Multi-purpose Pe Device
I am also in the process of testing a new Device that was developed OUTSIDE our community. This will be a first for me, and I can assure you it will only get my stamp of approval if it is very, very good. The only reasons I agreed to do it is because it looks like a very good concept, and the developer is a past member of this forum and as such has reaped the benefit of OUR wisdom. Review is pending.