to me this means sending sexual pictures or messages by text or picture messages I've done this with 2 girls I dated years ago I never felt they would show them to anyone I am sure they never did, I had sex with a lovely girl the other night with a girl friends set me up with no monies exchanged a truely great night great sex, the next day I sent her a picture message of my fully erect penis (I have a large mickey!)with an explicit message now today I meet some of the friends who put me in touch with this girl in the first place all unable to hold back from laughing they all saw the pics just be careful with sending sexual picture messages of yourself..