Bellybutton itching? during intercourse with another man i had multiple loads of "cum" on my chest/stomach. i'm worried some may have dried inside

Skin irritation...: The simple answer is to wash with a gentle soap and let dry. It is easy for the inside of the belly button to become irritated because it seems to collect moisture. After washing it gently, put a few drops of alcohol on it, and then a bit of antibiotic ointment. If symptoms persists, a doctor should examine the belly button. Also, one should check the rest of the body for rashes as well.