Answers

2016-07-07T16:05:59+08:00
Because it has thorns/spikes that might hurt or even infect you. 
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2016-07-07T16:10:44+08:00
Because the plant has spines or thorns that are sharp. They can painfully draw blood from you, and the dust that accumulated over the cactus can infect you because it may contain bacteria
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