My last gf figured it out....never found out how, she was really cool with it over 4 years, but everytime we would get in a fight she always blamed it on the gear. One time i made the mistake of telling her about tren, and how i thought my aggression got a lot worse when i would use that. So then she started to notice everytime I started tren in a cycle. The biggest problem i have with telling a girl about it is when you break up, you never know if they are going to keep their mouth shut or not. So I never would tell a girl again unless either she did it as well, or she was ok with it, and I figured I would be with her for the long haul.