Should I date a forty year old?

i want to get married but i dont find people under 40 mature enough to get married to. but i am scared forty years old men might have children with disability because of low quality sperm. i take care of my body but i dont think men think so much about that stuff. 30 years old are like 20 year old but more up themselves. should i go for the forty year old. i am not sure.

Should I date a forty year old?
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