Doggy Style Advice.

K β€’ dogs and wine. 🍷🐢
Ok so I like sex and I like doggy style....... When it works. πŸ™„πŸ™„ 
It never works. Like it keeps falling out with anyone I have sex with or try this. I've tired bending over more and other things but it just doesn't work. I want it to work. 
Advice to help the position to work please??