I've been able to do that from childhood on... Still can without hands. Never trained for that, I just could I guess. My hamstrings are awfully tight though, so I can't touch my toes when standing or sitting with legs straight if my life depended on it
Actual extreme-stretches/fascial stretches/parillo stretches are very useful imo... For avoiding soreness and so on.
But yoga? Hm. Not my cup of tea.