Are my ears not meant for technology?

A while back I bought an Ipod Shuffle because I thought that if I spent $70 on a piece of the newest technology, it would inspire me to exercise. No such luck. However, believe it not, I actually worked out tonight. My Ipod Shuffle came with the standard little ear phone thingies, as have many of my music players in the past, and I keep using them because I am too cheap to go buy the upgraded versions. The problem lies in the fact that I am pretty sure my ears were not made to fit these things. Everybody else wears them and never seem to have problems. I see skinny beautiful people jogging down the street with their little ear thingies staying in place perfectly, I see people walking down the street and hanging out at the dog park with these little things in place. Mine on the other hand fall out the second I get past the speed of 2.5 on the treadmill...think the vibration from my girls bouncing around has anything to do with my ear thingies falling out? They are also possibly the most uncomfortable things I have put in my ears...does anybody else have this problem or do I need to consult with a plastic surgeon about having my ears rebuilt so I can keep up with the latest technology?