Related Questions

I have a very bad lump on my face and doctor gave me erythromycin as its a skin infection. A friend said it could be my partners sperm being dirty?

Not the sperm. I would take the Erythromycin as prescribed. This issue is not related to your partner's sperm.
Not from sperm. I'm assuming this lump on your face is an infection, which is why your doctor gave you an antibiotic to use. It is a pretty far-fetched idea that you could have an infection on your face because of "dirty" sperm. Sperm is not dirty. It's possible your partner could have an std (syphilis) and that it spread to your face by direct contact, but that is not at the top of the list of possibilities.