I use vaseline for lubricant and always have. I know what you mean, people always mention getting a professional to sex your ball pythons but those professionals had to start somewhere. I personally was taught by a breeder at a reptile expo, I had ten minutes of show and tell and went home and attempted it myself and had no issues and have been doing it ever since. But I still have no clue if my ball python is hurt or not. I have never witnessed a snake do that before.