It would be wise to ask your friend first. You could lose a friend or gain a boyfriend.
I am a boy and I have a desire that I want to strip naked in front of my straight friend .What to do?
If you are willing to do things that will make your friends uncomfortable, you won't have those friends for long.
2 questions:
1) is your friend a boy or a girl.
2) If your friend is a boy, will that cause you to get an erection?
What's your motivation?
Are you doing it for attention, shock value, to make a statement or other?
If you figure out the why then maybe you'll know what to do.
Just because you have a desire to want to do something, doesn't mean you should. Learn to control your impulses and your desires or one day you will find yourself in hot water and wonder what happened.
Seeing that he's straight, you don't really got any options here. Just don't.
your probably gay. Or bi. Or something. Talk to someone about it, perhaps a professional and explain your situation. You could get a lot out of that