Is there any problem if ladies swallow sperms?

None, unless: Oral sex is normal and not harmful to you or your partner. The only exception is if either you has a sexually transmitted disease.

Swallowing Sperm: Swallowing sperm is a very common experience and thus a very common question. Many sexual practices include oral play and tasting or swallowing sperm is a normal and natural activity. Now, that does not rule out the risk of a sexually transmitted disease. Gonorrhea, chlamydia, HIV and syphilis are some of the possible infections passed along during oral sex.