I think my piercing helps drag the cum out cause it does pretty much get stuck to it. When I take it out for sex it seems like she needs to push the cum out just a little. I've had nights where after I pull out I get up to go grab her a towel or tshirt or whatever and there's a string of cum hanging. It's all just fun and games and we laugh about it. I'll be standing there going "ah damnit, big glob of cum just landed on my leg" and she'll laugh.
My wife doesn't necessarily squirt but there are times she'll just gush out a lot during an orgasm. Position doesn't seem to matter, just the intensity of the orgasm. I'll laugh after and tell her my balls are dripping now or "guess what? Your side of the bed has a puddle now!" That's usually followed by her telling me that her ass is soaked.
The wetter the better! Let it out and enjoy cause it usually means she's having an amazing orgasm.