With the banning of so many of the old nasty pesticides, the pest control people around my area have admitted that the only way they can get rid of spiders is to get them drunk enough that they'll follow 'em to the truck for another shot.

Sandburs are a "weed" whose seed is contained in a small "burr." They spread by latching onto (or into) passing animals. There are actually several kinds, with each area having a particular favorite.

The important thing to note is that if "nature calls" somewhere out in the country, be very careful about where you walk "off the road," or you're likely to come back to your vehicle covered with little "sticky things" that will continue to migrate around to cause "discomfort." And be very careful about where you let "city dogs" or other pets roam.

Sandals are only safe in paved-over cities in Texas - or maybe in a well cared-for lawn known to have been cleared of them. Even the middle of back area sand/gravel roads can sport a crop of them.

John