Assertion: erectile dysfunction's doctor | /r/CapableOf | examine the problem
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Source sentences:
text: Thus, if a man is unable to achieve an erection or maintain his erection, or, in some cases, not able to gain an erection that is hard enough for intercourse, for an extended period of time – such as when the problem persists every time he participates in sexual activities for a month – then he should see a doctor to examine the problem.