I have had this small number on my penile shaft for about a week and a half It doesn't bother nor hurt only if I squeeze it hard, at first nothing would come out of it but a few days ago some puss or a liquid similar to a pimple came out, I noticed the day after I masturbate so it developed overnight after masturbation I'm 16 and I haven't been in a sexual relation for quite some time does anyone know what it could be