I have a pump on my tailbone that hurts when I sit down on the toilet, when my butt cheeks are spread a little bit, but not by manually spreading them. My butt crack is also always a little moist (sweaty) and when I go to wipe off the sweat, I smell it just to check it and it smells bad. This started after I started having sex with my bf, (we started having sex about 3 weeks ago). Could it be because of that? I ve had sexual intercourse with other men in the past, and this has never happened.