Sex during PRegnancy

And the topic of the noon gossip team in the office pose was:-

Having sex during the later stage of pregnancy, can the sperm injured the baby’s eyes or stick to the top of the baby’s head?

Apparantly I can’t get the answer from the net but its seems :-

Your baby is well cushioned by a sac of fluid well beyond the neck of the womb (cervix). There's no medical evidence to suggest that sex during pregnancy does any harm to the baby. A loving physical relationship is important for your wellbeing during pregnancy, and sexual intercourse can actually help your body to prepare for labour.

so if its covered well protected in the womb, how can the sperm reach the baby?

duno....