Toys come in a variety of shapes and sizes...if penetrative stimulation isn't right for you at the moment you can always focus on clitoral stimulation and progress slowly. Rampant Rabbit toys are sturdy and reliable...they too come in more comfortable lengths/girths and focus on both penetrative and clitoral satisfaction. If you're really concerned you can always go to your doctor for their opinion...but it may just come down to inexperience and/or your natural size. That doesn't mean you're incapable of deriving pleasure from sexual experiences...you just need to a bit more research is all. Good luck.