I used to be a huge proponent of making my own costumes in the past. Frankly, they were rarely clever and often unrecognizable as an actual costume. Usually, people just thought I was well dressed as myself.
Last year, I borrowed the costume pictured. It was a very successful costume. If you wondering, "Is there a sex act that correlates with this costume?" Yes, there is, and no that would not be sexy. Bad Touch!!!
I am totally undecided on what I should be this Halloween, but I am pretty sure that the purchased sexy "whatever" is the best option.