Unfortunately I left my blue Speedo elsewhere while I was home for the weekend. Fortunately, I had several pairs of equally hot pairs of underwear. This gray and red one in particular is very soft and very thin, making it incredibly easy for boners to be noticed.
In this session, I use shaving cream to fill up my underpants in the front (on my cock, underneath my cock, and through the leg holes all over my balls), the sides, and the back (particularly up the crack). Feeling all that shaving cream down there made me very horny. Of course I didn't stop there. I applied some shaving cream to my feet, belly button, and armpits. If my boner wasn't noticeable before, the shaving cream definitely stuck to my skin and gave away the whole shape. Then I give myself a huge wedgie, showing my naked cheeks. I end up playing with myself, but that comes in part 2.