Re: Pregnancy scenario
The chances are pretty small, but technically it is possible. Even after wiping the hand, sperm still remains, and it could be transferred to the female.
A similar scenario happened to a friend of mine. He and his ex were both masturbating, he came, some got on his hand, wiped it off, fingered her (this is before they ever had sex, both virgins), and she became pregnant, though she later miscarried.
I wouldn't really worry about it, the chances are so small, but I wouldn't risk doing it again either.
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