I find that if you use a beard trimmer with a guard you can get everything down nice and even, it doesn't look stupid and you can still get suction. I can't see how your gonna pump without the sleeve though. Having your cock get pinched in the bellows isn't gonna be fun.
I pump VERY carefully, lol.
I just have to experiment more, but it certainly works.
If you can bench more than you can squat, you're doing it wrong!