Hot tubs: will 5 minutes in hot tub at 104 Fahrenheit do a lot of damage to my husbands sperm? He said he only went in for 5 mins. I’m pissed because we are preparing for ivf.. thoughts?

He didn’t realize that it could be problematic. He also said that the water didn’t seem too hot..so I called the pool to ask the temperature. He was in with my daughter and they said it was not long that they were in there. Looking for opinions and similar experiences! Thanks