Little Wet Thumb
While riding your partner doggy style, stick your thumb in your mouth to get it wet, then stick it in her ass. It's like strapping your one hand to the saddle while riding a bull, so don't forget to hold your other hand up and wave it around....
It was all I could to not get bucked off after I popped my Little Wet Thumb up my wife's ass as I did her doggy style
The wet thumb
When a person licks their thumb and then drawers patterns with the wet thumb on a bell end in a sexual way
That girl I met the other night gave me the wet thumb