Butter will keep for a long time refrigerated. Up to 6 weeks. You can also freeze this product and it will keep for over a year.   Hi - I only accessed this question as I hâ¦ave just tried some butter I had in the fridge. It is now Sunday 14th June 2009.
Sperm can be stored inside the male body for approximately 3 weeks after they've matured, after which they die inside the body if not ejaculated. So the entire sperm life cycle inside a man's body if not ejaculated (10 week maturation time + 3 week storage lifespan) is approximately 13 weeks or about 3 months.
In man, about 50% of spermatozoa are stored in the cauda (tail) of the epididymis, with the average time of storage in the epididymis between 10 and 20 days. Sperm can be damaged during epididymal storage by elevated temperature (such as in the presence of a varicocele), infection, or other hostile conditions.