SUNSCREEN in UV

I just recently discovered this channel and this video and and found it awesomely informative.  I learned so much from it and I like how the information is broken down so that it's accessible to an average person on the street. 

But... I was also completely distracted by the fact that Dianna and Derek were sitting on the couch with their footwear on.  Yes, I realize it's an outdoor piece of furniture and exposed to more dirty elements than a comparable piece of indoor furniture, but even so, seeing "shoes" on the furniture bugged the living daylights out of me.   It's a personal picky that is equal parts the buttons my parents installed in me growing up, and the fact that I live in a big city and walking through town, the streets and sidewalks are extra nasty and had visions of that gunk being transferred to the sitting area.  I"m sure I'm not the only one.  lol  So anyways, I had to watch the video a couple of times to get past that and fully get full details of the message <shrugs>
Love the science and the learning, but please, keep the shoes off the furniture.  even outside!  :) 

That little rant aside, I hope to see more from the channel that spark my desire to learn more!