I have read various posts on this board and others by people who say that they have firsthand experience of hard groin strikes not working. Even people who say they have gone on and won street fights, after taking a hard groin strike. Cobra even started a thread about taking a groin shot on purpose. I have taken a few really hard accidental kicks in the groin in the dojo and given a couple too, and while I understand it might not end a fight, as part of a combination it would definitely have an effect. Thing about it to me is not just the initial pain, but the really heavy feeling in the legs, like someone has poured molten lead in them, and also the loss of wind, making you feel out of gas. What causes this? anyway, strikes to the groin are definitely part of my emergency arsenal. Does anyone out there not believe groin strikes are effective? Why or why not? How about effective in combinations of other techniques?