Is it bad to finger myself with my partner's cum?

STDs can occur: Many stds are spread through bodily fluids. Those fluids can be directed transferred during sex or spread through other means such as fingers or sex toys. To limit the risk of stds, use latex/condoms & don't transfer bodily fluids between your genitals via fingers or other objects. Ideally, both partners should have full std testing and should be monogamous. Consider sexualhealth.Com for testing.

Pregnancy risk: Dr oldson's response is exceptional. If you are female, please remember that if you have ejaculate or pre-ejaculates on your fingers and place them in your vagina - this can lead to pregnancy.