yeah it's one of the greatest things about porn movies
"Hello mr. pipefitter.
I have a problem with my pipe, can you help me out?
Oh sure. Let me see what I can DO
Oh, mr pipefitter, it is soo big(..)"
Same with mechanics, cable tv guys, pizza guys, milkmans or other "common people".
I wonder why it is like that. Do women really fantasize about having sex with them? lol