adverse yaw
Adverse yaw is the natural and undesirable tendency for a penis to yaw in the opposite direction of a roll. It is caused by the difference in profile drag between the upward and downward vaginal thrusting, the difference in circumference of the larger penis and smaller vagina creates an induced drag between left and right walls of the vagina, as well as an opposite rotation of each testicle's lift vector about the verticle axis due to the rolling trajectory of the head of the penis. The effect can be greatly minimized with foreplay or other mechanisms deliberately designed to create reduced drag . As the major causes of adverse yaw vary with proper lube, any fixed-ratio mechanism will fail to fully solve the problem across all sex positions and thus any manually operated dildo will require some amount of brute input from the male in order to insert girth without yawing. Though adverse yaw is often associated with coordinated turns it refers to the uncommanded yaw rate or slip that typically results from improper lube techniques
The Urban Dictionary Mug
You should get the penis mug. It's pretty elite - Elongated Muskrat

Loved how fast this arrived! Fun blast from the past... Dana Hills Dolphins!

It shows exactly what I want!!
its an alright mug. its moderate. mid. not the best. not the worst. pretty normal. if it was the weather it would be 50 degrees F. something so unexperiencing and experiencing at the same time. if it was on a number line, it would be in the center. i rate it a 5/10.
I can't believe my name became a meme. I love this mug.
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Jana loves her mug. Drinks from it everyday and counites to inspire her. Thank you so much for this gift
Best mug ever!
this is actually a good mug
Computerly good
It's excellent for memers from NSBHS who would like to have a good laugh every morning.
It was a gift for my brother. He absolutely loves it
Very easy to order and mug was made and delivered promptly. Looks great.
Coffee cup was easy to order. It was made and delivered promptly. It looks terrific.
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The mug arrived on time and it was what I expected!
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