At 5.5 girth my wife stays wet for a long time, but if I over do it she dries a bit, due to excessive friction I think.
When I was 5.2 she never had this kind of problem. I will tell you this though, cross my heart, the amount of her bodily fluids were less. Just a nice wet vagina through the whole act. With 5.5 girth the vagina is way more wet and slippery, she is actually gashing, but not for the whole act. Which I think it means that she hits max pleasure for 5-15 minutes and then dries out. In the past I think she was more like increasing pleasure for longer which made sex kind of a marathon.
I think 5.2-5.7, would be the highest acceptable girth for your woman not to dry too early if you want to go for the gold
Otherwise you might need some breaks, to give another kind of stimulation and then start fucking again.
Which is good in many cases but not always.
Just my thoughts. If anyone wants to hit 6 or above, go for it, but be prepared for the consequences.
BPEL 7 EG 5.5 NBPEL 6.5 Flaccid length 4.5. Started Jan 2015 at bpel 6.5 nbpel 6.0 and eg 5.2 flaccid length was 3.5
I have reached my goal. At least for now.