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1.
The fear of communicating with the male species simply because they may whip their penis out at any time. This may throw a woman off when a man spontaneously gets his junk out.
"Yeah she was talking to some guy in the club last night, but a real case of penis fear kicked in when he asked her if she wanted to go and see his flat"

"Dude i tried chatting her up, i think i gave her penis fear"
by Numanumayay October 13, 2013