There really needs to be a description of what the different parasites do in the help menu?
pretty self explanatory, but i will give the unique usses of them
for werms i think its just reproductive speeds and mindbreak accelaration?
for cannals it gets intresting, blue double the werm out put for the orafice its in AND can make a cavity in the penis for more werms, however the red on a woman, and yes that in cludes a transformed max,will make them grow a penis that can then be infested by a blue canal
for stars, cyan is default, blue has huge titty growth and on females it gives them a second set of titties. the red makes titties smaller, not sure what use they have
as for the biosuits, not sure, since we arnt given anything aboutmaking them probably next or future update, but the werm biosuit can give you a unique sex scene when you visit a club
*EDIT* the chokers proably give personality things, as is shown with quin when comparing cyan, blue, and red chokers
if there is anything else i dont know it.