If you’re a sex geek like me, you’re probably familiar with all the different positions for sex and have tried, well, most of them. But guess what? I just found some sexual positions that confounded, yet intrigued, me. Positions that, unless you had mad skills of strength, agility and concentration while sexually aroused, you wouldn’t be able to pull off. So, for those adventurous (or curious) people out there, here are six impractical positions for sexual ninjas. I've rated them in difficulty from one to 10.