dear doctor. i have recenly been feeling a ichy irratiaon on the top of my penis, it does not feel like a burning pain however does irraite me. i have had the pain before however it jus seemed to go by itself. i have a sexual parnter but we alwayz use condoms. i went for a std check up 2 weeks ago and it came up negative and since then i have had no sexual encounters with my parnter or any other female. my question to you is. can you get a std from self masturbation, or from cleaning up with a dry towel, or is the irration just due to soaps i use or my diet?