What are the chances of becoming pregnant only rubbing their geneticals, but not penetrating?

Pregnancy requires that sperm emerging from the erect penis make its way inside the female genitals. There the moist environment will enable their movement up into the Fallopian tubes where they fertilize an egg. What you mean by "rubbing" is not clear but if the encounter does not allow sperm to enter pregnancy will not occur.

Anecdotal at best, conceiving does require intercourse, not using contraception as a safety measure when pregnancy is not desired may create anxiety.

While you are not at risk of pregnancy from this episode, your behavior is putting you at risk of pregnancy and STDS. Visit this site for guidance on safe sex: https://www.hopkinsmedicine.org/health/wellness-and-prevention/safer-sex-guidelines Get HPV vaccine Use contraceptive all the time, every time. Wish you good health!