Is johnson baby oil ok to use for masturbation lube? some say it's not good because it is petroleum derived. will it enter urethra and cause problems?

Yes, it's Ok...: Yes, it's Ok to use baby oil during masturbation. It will not cause problems with urethra. Do not use baby oil for vaginal or anal penetration sex. Make sure to wash and wipe dry afterwards so the oil doesn't cause acne in your genitals. KY jelly is commonly used for masturbation, vaginal sex, and anal sex. You can talk with urologist about treatment for Peyronie's disease.