> Most biological processes are modelled and assumed as being normally distributed due to the central limit theorem. Things cannot be distributed where the dis

> Most biological processes are modelled and assumed as being normally distributed due to the central limit theorem. Things cannot be distributed where the distribution has values the thing can never have. The time until an event cannot be negative. The cdf of a normal distribution always has a non-zero value at zero. There is no chance a sperm is ejaculated before it's made. That's a logical impossibility. Thus time to first sperm is absolutely not normally distributed.