Is it normal for me to use prostitutes for oral sex instead of my wife?

For last 12years i.ve been visiting prostitutes. Very occassionally I'll have penetrative sex with them but only if they:-
* Have massive tits(like to see them swing about when doing it doggy style)
* Have very skinny waists&bums(to make my dong look even bigger when its going in&out)
*Are wearing stockings+suspenders with skimpy panties(I like to pull them to .1 side&slide my thick penis in&out of a girls hole while she's still technically got her knickers on)
* They're in the mood for a good seeing to&do it for the same price as a blowjob

Normally I just go for a B.J but only if she.s happy enough for me to finish off all over her face.You'd be amazed to find out how many prostitutes don't like having a mans load spoiling their make-up.Fortunately i use 3 regular girls who are quite happy for me to empty the contents of my testicles all over their faces.
Maybe this is the issue,i feel it would be degrading for my wife to have my load of jiz all over her face.I do shoot a good sized load of it too, so when i'm done it usually goes up their noses, in their eyes and all over their hair.This doesn't worry me with a prostitute, i just casually put it back in her mouth at the end so she can clean me up&I don't leave any silvery stains in my tight fitting black cotton boxers for the wife to find when she's washing them.I don't have a problem with a working girl getting a facefull because i'm paying for the privilige but wouldn't like to do it to my wife of 20 yrs.
Other than that we have a very healthy regular and normal sex life.For over 3weeks/month we are "at it" at least 3 times a week&each time i leave her with a good deposit of my love juice dribbling out of her tush as i pull out my nice fat willy from her well used hole with a satisfying slurping noise.
I'm a highly sexed person&could do it every day.Last week,a new secretary (an older women)started in our office&after a few drinks after work on fri i offered her a lift home.As we arrived at her house she said she couldn't invite me in as her husband was there,but started to unzip my flies,pull down my boxers enough to give her access&while i lead back in the drivers seat she gave me a wonderful blow-job.My wife had been on her period for almost a week so i was well loaded shall we say. Wow this lady could suck, gave me deep throat&treated my balls to the best licking they've every had.She was in the right place at the right time tho at the end,shoved her mouth right down to the bottom of my willy,leaving a lovely lipstick ring at the base of my todger&hung on for dear life as i let out a huge grunt&splattered the back of her throat with my sticky hot sperm.She was gagging at the end but fair play to her hung on in there till i was fully empty&in the way that only truely dirty bitches do, she opened her mouth to show me the contents&with a big smile swallowed the lot then said "bloody hell that was 1 big cock to suck&1 big load to drink,have a good weekend!"