I am in a committed relationship with my boyfriend. After being on birth control for 4 months, I have finally felt comfortable having sex with my partner without a condom. This, as you all may know, leads to the "post sex seepage." I usually go to the bathroom immediately and pee, and wait to allow gravity to do its thing. The last time, I noticed something odd. The semen that fell out of me had sank to the bottom of the toilet and began sprouting long "legs" in the water. I called my boyfriend in to let him see this spider-looking thing and he thought that it was his sperm swimming, trying to find an egg. I have tried to look it up on the internet but have not found anything close to what I just experienced. Is this normal? Should I be concerned?