I would say my beard is not very thick as I can't grow a mustache or a goaty, but I have very sentitive skin. I had a really hard time shaving my neck without getting all red and feeling it like burning. It got a lot better when I switched from using the classic shave foam to Nivea cream with a brush.(it's also a lot cheaper) I usually do one pass with the grain and one against the grain and don't need another shave for about 3 days, so in a week I usually shave 2 or 3 times.
IMO the reason so many multi-blade cartridge users have "sensitive skin" is due to the fact that they peel a fine layer of skin off every shave. This then necessitates the use of post-shave "stuff" to heal the damage; followed by different post-shave "stuff" if the first lot didn't quite fix it; ad nauseam.I am currently using Bic Flex 5 cartridge razor with a brush and Nivea shaving cream. I was told I could save money by switching to safety razor.