Even on land, with no undergarment, if I stretch out my legs and shoulders, I can feel it in the crotch. The material itself is coming up too far in the crotch. For my height I should have the 2XL/3Xl, but weight the L/XL....
For you, could it be the lycra bringing the suit up and giving that uncomfy feeling? The suit generally feels snug. A good test to see if your hitting the limits of the suit, take off the skin...Put the suit back on, with just the inner bladder. This will tell you how snug the suit really is. Most of the time there is plenty of room, but the outer skin makes it seem really snug. It could be snug on you anyway, its hard to say.....but you can try that to see if you can move to a bigger UG.
Hope that helps a bit....
