Hi Coffeedrew,
Interesting question you ask, yes some pants can help for sure. As mentioned a high waisted pant would help cover the "Plumbers Crack" and I have done this as well. I went and got some NYDJ jeans from Nordstrom, those jeans they sell are of a stretchy jean fabric so the can work very well to smooth over things, plus that brand is more for matured Ladies and can adapt well to a male figure. The other thing which works super well is using a bodysuit to keep the shirt tucked in the pants. Bodysuits are amazing things which help hide that nasty coin slot. A company in the US has a wide variety of bodysuits for male and female. I use bodysuits all the time now, in string and full bottom. It makes for clean crisp look and paired with a good pair of high waisted jeans may help answer your question. Hope that helps, ps if you wish more about the bodysuits PM me and I forward you that info. Liina