Sperm exposed to room air on clothing, bed linens or toilet seats lose motility (the ability to swim) rapidly and die within less than one hour. Once the semen dries out, the sperm is dead and cannot fertilize the egg. My tension is that can anybody can get pregnent by very dry sperm ( stain on underwear) .If a girl sit on same area of ejaculation with his clothes on panty and leggings). I ask from the doctor they say no need to worry. But still I have useless tension. How to remove it?? Please doctor help??