sperm goes stale

Monica
So I just found out that after 5 days sperm can go stale. 
My SO and I have sex 1-2 a week. Recently we started to have sex more often from time to time. 
My partner know that is sperm count is hella high. Like top 10% high count. 
Since he has such a high count is it possible that it takes longer for it to get stale or does the same rules apply?