The concept of affordable memory erasing, so far, are only in movies.
Inadvertently though, over the weekend I found another way to replace those memories you wish to erase.
By : creating new memories of similar nature, somewhat, but with new elements.
And thus now should someone mentions road trip, I carry the freshest memories and let it run over the old ones.
AM, IH, NIG, ZMN, II, F, and even 'Ayoh'
They don't know it, but they've made me a much happier person with the memories of their antics.