A girl get pregnant i 3 inches erect penis please help me.?

Yes: The length of the penis has almost effect on intercourse if the penis is past the internal vulva and the male ejaculates there is always a chance of pregnancy it is stated that 3" is long enough to satisfy the female i can only say that if you don't want to get pregnant or catch a std no matter the length or suggestion of the partner safe sex should be observed and a condom should always be worn.

Yes: If I remember correctly the upland gorilla is less than an inch as a mature adult and seems quite capable of reproducing.