I’ve often been told that this isn’t actually true but I can’t help but feel that it does happen. Until recently I hadn’t shaved for about a year, maybe two. Now I feel like it’s growing back quicker than what it did the last time (after shaving on a more regular basis).
It doesn’t, it’s a perception bias caused by a few different things like others here have mentioned, but also freshly grown hair tends to be thicker, then tapers off as it grows, so it SEEMS thicker.