Not a surprise, since you did say you might do it again in your op. But no, not okay. Any behavior you're unsure of - again, your op and this post are pretty clear that you're not sure this us ok - and that you don't seem able to control should be a concern to you.

At the beginning of the thread, I wouldn't have advised you to tell your therapist since it seemed like it would be unnecessary drama to me. Now it seems like it's not just curiosity - which would have been satisfied by a one-time event - but something more. I think you should tell someone who can help you at least get a measure of control over this impulse. That may or may not be your therapist.