Thanks for trusting us about your health care.
I can understand your concerns.
The chances of pregnancy are very less in your case.
Because for pregnancy, penetration is important or semen should be ejaculated inside.
As it is on blanket the chances of sperm survival is also very less.
Hope it is useful, feel free to discuss more questions.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.