Hi there. So I found quite a few months ago (definitely over 3) that I have a painless bump on the right side of my penis shaft. It's connected to a vein and is slightly noticeable when I'm not erect (unless I masterbated vigorously or if my girlfriend and I were messing around, in which case it's VERY noticeable). It's soft and squishy, but when I'm erect it's more prominent and "bulge-like." When I ejaculate, it gets even smaller and more fine. Any idea what it could be?