All that is to say that people bring up thigh chafing to me all the time and I'm ever exploring ways to prevent and treat chub rub. This summer I talked about it briefly to a couple of folks and I was given the tip that this all-natural diaper rash cream called Butt Paste is great at preventing chub rub.
So, how to solve the issue of chub rub? First of all, I want to say this is not just a problem for fat people. This is a problem for lots of folks of all sizes who wear pants and who wear dresses. Chub rub is a pervasive fashion issue. Luckily, fat femmes have each others' backs and we've been swapping these solutions for years. Here are some methods I know about, starting with the two I prefer.