Anatomies are a tricky thing and no two are the exact same. I thought something was wrong with me too until I met someone who came every single time I went down. He said everytime we got together It was like I was sucking the soul out of him. Lol. On the flip side in the 20 years I've been active (more or less) I've only came twice on solely vaginal, but combined with and/ clitoral stimulation, my Os are out of this world. I have to be. Emotionally connected for it to work tho, otherwise it's a flatline_____. Just make sure to communicate with your partner. And have healthy dialogue about what you both like. Don't be afraid to try new things either. Most importantly... Have fun!