Good morning Jess
Ok so from the giver point me 🙋🏻♀️
1st off you need to be really comfortable with your partner. Not afraid of talking and finding out what they want from this and really listen to them. Find somthing your comfortable wearing for this https://www.lovehoney.co.uk/product.cfm?p=37885 (for me best we have found is the lovehoney briefs ). We found starting small helps also something smooth without harsh ridges our fav is this https://www.lovehoney.co.uk/product.cfm?p=30709.
Plenty of lube we like to use a water base lube as this works good for us.
Lots of foreplay to begin with. I normally give him a bj while playing with his balls and gliding my finger over his bum hole (giggles this word still gets me like a goof)
Pick a comfy position ( we like doggy for this) and start slow like real slow. Let them help take control but pushing back onto you till they are comfortable with it inside them. Then start slowly thrusting.
Main think is not to rush into this as it's easily to hurt someone by being too rough and could put them off from trying it again.
2nd from the receiver (hubby)
His pretty much the same as me definitely start small and slow. Lots of lube. For him he has to be really relaxed and really horny for him to want this. He loves the feeling but needs some attention on his man good so I use a hand or he with use a sleeve while I'm pegging him. He cums so much harder being pegged and says it feels so much more intense.
Hope this helps x