If you feel it would be easier to insert bulb using a lubricant. We recommend Uberlube. It is FDA registered and the highest quality medical grade silicone. It is multipurpose too! So you can use it as an all-purpose serum. It works great as a general moisturizer, hair gloss, and anti-chafing serum. 

Buy Uberlube here: http://www.uberlube.com?afmc=Kegelbell