How many times is it ok to take ecstasy in a lifetime?

im trying to get a realistic answer, so please don't respond if you have no clue and think its an outrageous question. ""ok" is the operative word, not "great, 100% safe"
not that thats not very sad and serious, i have taken ectascy before, and those people mustve been allergic, which is why they died their first time. unless you are allergic, it is almost impossible to die from the drug itself. the only other way is if you are unexperianced and dont drink enough water.

: http://alcoholdrugstreatment.info/how-many-times-is-it-ok-to-take-ecstasy-in-a-lifetime