What makes my mum not allow mild learning disabilities, but is fine with moderate or severe learning disabilities when it comes to dating men?

I always has promblem with my mum when it comes to daring men and yet she restricted me for dating a mild learning disability but is ok for me to datw men with moderate or severe but i don't want to date a severe learning disability men. I want to date men thar are mild or moderate. Why can't i get my ways with my mum?
What makes my mum not allow mild learning disabilities, but is fine with moderate or severe learning disabilities when it comes to dating men?
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