Straddle

At my Dad's workplace I straddle a hand rail going to his office. It has bumps on it and if I get one right between my legs I ride it until I tingle and shake, it's best when I wear ski pants because it presses my pants up me and I like the way my privates bulge, if I touch myself there it is hot and I spend all morning doing it until I shake and feel tight in my tummy.