Besides when cold or dehydrated, it's also a common side effect of doing to many stimulants like adderal or cocaine. Your penis shrivels up and gets hard from the vasoconstriction, and retreats into itself like a turtle into its shell. You are also basically impotent during this turtle dick state.
I'd love to have sex with you but I took100 mg of adderal and I've got turtle dick.
A sneaky, deliberate maneuver during kinky scat play where one partner temporarily retreats - usually waddling or clenching - to "scout the terrain" (i.e., make a quick, preemptive poop) before returning to the scene with renewed, devious purpose. It’s like a tactical dump before going full commando.
"She said she was into the mess, but wanted to do a Turtle Recon first to ‘lighten the load.’ Five minutes later, she came back grinning with wet wipes."