
Water jets and jacuzi type bubbly hot tubs in public pools have made me cum in public a few times.
Sometimes I put a small vibrator into a condom and put it on. I wear it with undies and pants while doing chores until I cum.
Once I came from the vibrations while riding as a passenger behind my then gf on her motorcycle. That one felt good but the mess was bad.
Either can be nice if everything just works out for me.
But I have a big boobs preference for sure.