I think this is it.?

ok this is a follow up of my last question. about getting a bj from my gf when ive recently devleoped a skin rash on my upper thighs. its not an std or anything that she could get from me. but i was wondering to just avoid the whole thing is there anyway i can just leave my boxers on while she does it? i need ideas please and thanks.|||Um do it in the dark??? Tell her u have a rash??? Or just get her to pull it out of ur pants