What is a foamy discharge after innercourse?

Normal: Most likely a combination of your lubrication and his ejaculate. For less fuss & muss, make sure he wears a condom each & every time. This will lower your risk of becoming pregnant or catching a sexually transmitted disease (infection). Just in case condom breaks or slips off, it's always a good idea to regularly use a 2nd method of contraception eg birth control pills, patches, shots or implants.