The answer is Rollerblading. If its in a long duration of time and is aerobic, that should be the answer. As long as you're breathing as well as you should :)
"When water molecules escape from your frozen food, it is also possible for oxygen molecules to seep in. The oxygen molecules can dull the color and modify the flavor of your frozen product. Food that has freezer burn is safe to eat, but you may find the texture and taste not to your liking."
Source - https://www.loc.gov/rr/scitech/mysteries/freezerburn.html
No I don't think so cause the tiny sperm cell is unlikely to travel through the whole body
Answer:
you should not park on a hill