Hey Justlove -- no need to worry, the sperm on this towel absolutely did not survive the wash and no one can get pregnant from using the towel. There is a misconception about the strength and intelligence of sperm,
which you can read more about here. Additionally, in order for pregnancy to be a possibility, the kind of contact that has to happen is direct genital-to-genital contact between someone with a penis and someone with a vulva and/or direct contact with semen and the vulva, vaginal opening or anus.
Can we help with anything else?