Is precum dangerous?

Basically he had a drop of precum on his belly laying on his back. While i opened the condom, he rubbed the precum away with his Hand until it was completely drie. After that i put on the condom and he touched the condom to Check if i put it on Right. Thats why im scared, but his hands where completely dry. Should i be worried about that precum? I read from a midwife online that its enough to wipe fingers with precum or sperm dry and then you will be on the safe side.