My girlfriend and I have started doing something really fun recently.
I’m well-endowed (a bit over 8.5 inches) and she’s extremely fit and trim. And so, when I enter her my cock makes a visible bump in her tummy. Recently, we’ve begun doing the following:
I enter her, missionary style, and then I lean backwards to push my cock “upwards” and accentuate its outline inside of her pelvis. Then, one or both of us starts stroking the bump, essentially rubbing my cock through her tummy.
The feeling for both of us is amazing. Depending on how long we can “edge” me, she often cums from the stimulation. And it always ends with me exploding inside of her.
I highly recommend it for partners who fit the criteria.
(For the curious, here are [two](https://www.reddit.com/r/distension/comments/8k47ak/1010_stomach_bulge/) [examples](https://www.reddit.com/r/distension/comments/aylr4t/dick_in_stomach/))