The issue I have is when inserting a wide, 4 to 5cm diameter plug deeper than 15 to 17 cm. I am aware of how the intestines are shaped and that there is a sharp bend at about that point. However, I frequently see several people going way past beyond that point with very wide plugs showing the infamous belly bulge

For those of you that are able to go both deep and wide, how did you learn to go past this obstacle? Should I try to get a soft but wider type of anal probe? The slink I have taper very gradually from about 1,5 cm to about 5 cm at the base so that is likely just bending itself along the path of the colon as it goes deeper.
Any advice is welcome, many thanks in advance.