I doubt you will find very many people who do full contact sparring period. Hard contact, certainly, but there's pretty much always a little more in reserve. Because it's sparring. And yes, please explain to me why head contact would be frowned upon. And before you start, you might bear in mind that while I have roughly ten times as much TKD experience as you, I'm willing to bet I have roughly a hundred times more medical training than you. Because 35 years in the ER... If some schools prohibit kicks to the head, so what? There are schools that only spar no contact. That's a school issue, not a TKD issue.