Leathers should have a bit of extra room in the crotch, knees, and length at the bottom when standing. Those areas tighten up considerably when you sit, especially the crotch. If you don't have enough room between your legs now it's just gonna get worse when riding...
I never said you won't have any extra room anywhere- just that your leathers are not designed for chilling outside starbucks sipping a latte. The knee armor will seem too low, your butt may have more room (not in my fat-ass leathers! ;]) and the inseam may seem too short.
The knee armor will move up when you put your legs onto the pegs, the butt will not be so roomy as you lean forward, and most leathers are meant to be inside a boot (some dainese, like Rossi's can be worn over the boot).
Most decent 1-piece suits, or even 2-pieces will have that accordian-style leather expansion above the knees and in the small of the back to allow more mobility and comfort. Many new suits will have that stretchy keprotech stuff by all the joint areas and at the crotch.
This won't make sense if you are sitting bolt upright- even the monster's "relaxed" ergo's are still fwd-leaning. Beside's why are you sitting upright in the twisties

? It's much clearer with a more "sporty" position w/ clippies and rearsets.
Ally-cat, I prefer to think of the "bulge" as frontal aerodynamic feature!
