Mrs SXE wants a bullet that's a little longer for use during sex, at first this:
http://www.lovehoney.co.uk/product.cfm?p=21991
looks ideal but we've got another Rocks Off bullet and the tip sometimes ends up trying to give us both a new piercing just at the wrong moment.
Currently we've got a Tracey Cox Supersex bullet which is great, but it's a bit short and gets difficult to hold onto when covered in silicone lube!