If a guy pre-cums in his pants and a hour later puts in his penis for a few seconds Can a girl get pregnant?
No. You will not become pregnant from the previous ejaculation
that occurred 1 hour ago as Sperm dies within a few minutes of
coming into contact with air. However if Sperm or precum entered
your vagina AFTER he previously ejaculated & when he entered
you, then this could result in pregnancy but the chance of this
happening is very very slim.