Is it normal for me to enjoy really dirty sex with my wife?

When we have sex, at times I like it when my wife will finger my ass and play with my prostate. I really enjoy the pain of her shoving her fingers in me. I also like it when I've ejaculated inside of her and she straddles my face afterwards. I really enjoy the feeling and taste of my semen dripping from her vagina. It gets me really hard and ready to go again. Even better is when some of my cum drips onto her rectum and I lick it out. Is any of this normal or am I strange?