Interacting, chating with someone with  Lower Intelligence than your own, is tempting, because your brain enjoys the absence of otherwise necessary alertness and challenge, hence relaxes, but should always be avoided.  Brain never stops, it either fastens or slows its pace, depending on the company you keep. It is always better for your brain to meet challenges, be exposed to new concepts etc. In short, ‘equaly or more clever than you’  friends, companions, relatives, colleagues  etc  are much better than stupid ones !