I've been slowly going native in the "motherland" Latvia for the last 10 years, after growing up in sub-tropical Brisvegas, Australia ... analysing the differences, advantages, life styles in both places.
Many of the images on this site are by husband Jem - and most of the images on the site are of my offspring Tiss and Mik.
I had the same issue with Didzis'pants, but his was the left knee - I never solved the mystery, but now that he is older we don't have that problem anymore - I think he just falls less now, but it could also be that he only wears shorts here in Malaysia.