Gay Prostitutes

Sorry if this is too graphic for some of you, but I am a fella in my 30's looking to spice up a 13 year relationship and have been thinking of hiring an escort. Had anyone done it? Did it make you feel weird? Think I would be looking for just a massage for both of us, not anything too full on. Worried it could have the opposite effect on what I am trying to achieve. Also want to know what the etiquette is. Any advice. London.