A thing I had to learn from experience about WordPress is that there are, apparently, a lot of people who decide to promote their blog by just following every blog that posts in a tag related to their own blog. So if I tag a post with “sex” or “Christianity,” for instance, I might get followed on the basis of just that one tag, alongside everyone else in the tag. People do this so that those bloggers will get the “new follower” notification and possibly click to visit them. Presumably, the people who use this promotional tactic never actually read their dash.
Anyway, that’s my best guess as to why my follower list features a strange mix of sex blogs and devotional blogs.