In the series Don't Look too Closely (all the angles are oblique) (http://archiveofourown.org/series/29050), I think I remember reading Tony progamming sex toys for Steve and using a set of armor as a sex toy, but I don't remember which fics that stuff happened in.

There are also voice activated sex toys in Taking (https://archiveofourown.org/works/696716) (part of the Steve Rogers Never Was a Boy Scout series).