@Dmitry, maybe you could tell us that if I spend more than x number of minutes in a hot shower with y degrees celsius, or above, for a period of t weeks, then my little swimmers will be ineffective for z number of months.
maji moto ni relative, bwana. what may be hot to you may be a cool shower to me. o'wise we have no idea what temperatures the 1950's men were subjected to for 3 weeks.
Luck is when Preparation meets Opportunity. ~ Lucius Annaeus Seneca