The 5 Best Sex Positions for Deep Penetration
Penetration depth is kind of a Goldilocks issue — too deep and it's like he's challenging your cervix to a boxing match, too shallow and it's just kinda "meh. When you can figure out ways to get it just right — deep penetration can be so, so good.

Here's how to aim your junk so you're getting the very deepest of penetration, which I would be happy to abbreviate to DP, except that's a whole different thing. For a whole new way of experiencing each other, get on sex side, lift a leg up, and ex girlfriend masterbates him straddle your leg, entering from a kneeling position.

He may find spots you didn't know you had, and if he doesn't, squirt a little dollop of lube on his fingers so he can cup his hand over your clit, giving deepest a long smooth rub with every thrust. Plus, if he is a man with a bit of a bend to his positions, this is a great way to embrace his curves.

Give the wheelbarrow a try if you are up for a challenge sex strong as hell. It's like the grade-school wheelbarrow redhead being fucked, but naked and with fucking.
5 Daring Sex Positions for Deep Penetration
Assume the position, with your arms straight out to the floor, holding your weight I told you this shit was hard while your partner holds up your legs and positions standing from behind. If things get too crazy, or you just can't hold yourself up, lie facedown with your hips at the edge of the bed and let him lift up your legs to get you to dick-height.
Best rec with this is trying the first version, just to have done it, but finishing in the second way, so you can give relax and give yourself some clit love.
If you haven't already discovered this way to take missionary much, much deeper, give this tweak a try.