hello thank you for trusting HCM dear it may be due to non-STD causes, such as irritation from shaving, rubbing on clothing, an infected hair follicle, or an allergic reaction to a new shampoo, soap, or lubricant. Sometimes these skin findings can be easily confused with spots or bumps caused by a sexually transmitted infection. few STD causes like herpes and papilloma virus infection etc.. until examination done it is difficult to say what it is. please consult your doctor he will examine and treat you accordingly. I think I answered to your question if you have more questions feel free to ask. take care