TTC possible TMI

We have been TTC for a couple of months now. Not going to lie we aren't trying very hard (I don't track my period and when I am ovulating, and we don't necessarily BD as often as we really should since he is tired all of the time from working) but I have a question for you ladies.

How do you keep your man's "baby juices" from leaking out? I have tried laying on my back and putting a pillow under my bum to keep my my hips tilted, but it always seems like it leaks out and more of it ends up on the bed than inside.

Even though im slightly prone to getting UTI's, i usually just lay there and end up falling asleep (if we do it at night).