So this is a concept that I have somehow not made before now but made concepts that were almost this. For example, I've done balls in panties with dick out, penis poking out of leghole, and penis pointing towards the sky. This one is basically a cherry picked version of those datasets and was an informal request. In short, this model is for showing some shaft and the glans poking up through the waistband of shorts, pants, etc.
Notes:

• Tends to work best when you describe clothes with an exposed stomach.

• It might help to have open_fly in the negatives if you are describing clothing that would have a fly.

• There is some cock size control but bigger sizes will obviously mean a higher percentage of the shaft will be exposed.(Basic science)

• Sorry to no ball lovers but most of the dataset had ball bulges this model will probably produce those.

Basic Prompt: glans_peek, futanari, erection, penis

Side note: I do take informal requests(basically a bounty that you don't have to pony up buzz for) if I like the idea(Tips are nice but not required since if it's a good idea then I'll get generation Buzz). Just leave a comment on one of my models or DM me. (Comments are preferred since that let's other people see that I'm actually fulfilling informal requests.) DMs are perfectly acceptable if your request is a bit out there and needs some image examples or something.