I am on the gel because my doctor and psychiatrist felt that with my history of mood and panic disorders, I should avoid getting the shots. They don't want to have me hit the highs and lows of the cycle with the shots, basically. As far as topical transference to others, I just wash my hands throughly after I apply it to my upper arms. I then wait 30 min or so for it to completely dry and absorb into my skin, then I shower. Voila! No chance to transfer it to others.