I recently received brief oral sex from a guy that lasted about 25 to 45 seconds. I stooped and then I began to mastebate, as I did he stood beside be and showed me a sore on his penis that he said was from frequent dry mastebation. As I looked at it it made me think of a syphilis sore. Now I'm freaked out that I may have been exposed to syphilis from the oral. Any thoughts from you folks would be welcome.