Well first off your clit is very sensitive and can be very pleasurable if you get use to it. Two fingers in pussy and rubbing his clit at the same time feels pretty good. Other than that having something cold up your cunt is a total turn on. But don't use bananas. If they curve they hurt like hell.
just stick up anything thats hard up you. Try the end of the brush. Some brushes have a long ending and it looks kinda like a dick. So yeah.... thats what I used to do and it felt.... awesome :) Gd luck :)