Anal fingering, a given?¿??!

Meg
Hey everyone ☺️
So, I am in no way blinkered or innocent to what foreplay and a make out sesh entails, but recently I got together with this guy I'd been snap chatting 
(This is purely casual and planned sex, all positive, all good, respectful 🌞) 
But as things got hotter and we moved to the back (of his car lol) he started fingering my anus (consented!) 
It was just an afterthought then in my mind, to wonder do all guys WILLINGLY do this? 
I'm 21 and have enjoyed a good sex life since I was 17, but at that I have only had 5 sexual partners.
Just a thought! x