quote; The flea can jump 350 times its body length. It's like a human jumping the length of a football field.
Only if he is a 9-3/4" tall human, 350 times 9-3/4" is just under 300', the length of a U.S. football field. (Canadien field would require a taller person.)
quote; Humans and dolphins are the only species that have sex for pleasure
But not with each other, although there is a video of a dolphin humping a trainer at the edge of the pool.