I rarely ever have anyone ask, although I did when I was younger...in my teens and early 20's. I think many of the people who get asked are the one who appear to be the most approachable and friendly. Go to the typical steroid gym and look around. There are a lot of guys there that the general public would think are on steroids, yet there can be a big difference in the vibe one gets from different people. There are some guys that most people are unlikely to even start up a conversation with, let alone ask them if they take steroids. These are the big guys who keep to themselves, don't smile much, and have a very masculinized (some would say mean-looking) face. At the same time, there are other guys walking around talking to everyone with a big smile on their less masculinized face, who are also big, but appear to have a much more approachable and friendly demeanor. These guys are much more likely to be asked if they use steroids once a conversation starts up.