A good clit sensitiser is to use a Turkey Baster Bulb. Lick the opening and place it over the clit and squeeze. The clit is sucked up inside and makes blood rush to the clit. It works very well.
You can use two on the nipple area as well. You can also use the bigger end of the tube to place over the nipples and suck, the nipple is drawn up into the tube. Place your finger tip on the end to keep the vacuum. You can do this on the clit too. Fun!