Having sex daily reduces sperm quality?!?! Myth or True?

[Patienceofatoddler]

I've seen mentioned a few times that daily sex reduces sperm quality?

Is there any truth in this?

Is it a myth?

Anyone know any studies / links or data to back this up?

My fertility consultant said there’s no evidence for it. He said sperm regenerates fairly quickly. Having sex more than once a day can reduce quality (as in the subsequent sperm won’t necessarily be as good as the first lot) but he said daily is not an issue at all