Typically, sperm survive on paper for a short period of time after ejaculation, usually only a few minutes in the air and even less at lower temperatures. Sperm can survive for a long time in the body but can die within minutes after ejaculation when exposed to air and lowered temperature. The survival time is even shorter in cooler or warmer environments, several minutes in warm water and only a few seconds in chemical environments. The survival time of sperm entering the vagina is 20-30 minutes, and longer after entering the uterus, with studies in the literature reporting 3-7 days of sperm survival in the female uterus. In addition, ultra-low temperature storage of sperm can keep sperm alive for a long time. In conclusion, sperm survives for a shorter time after ejaculation with paper and the ability to fertilize decreases dramatically, so there is no need to worry too much about getting pregnant.