Facebook's user ID is the email address you sign up with.
Check his email and see which account the facebook notifications are going to.
From there, try guessing a password. If that fails, request help for password and a reset will be sent to his email. So don't do it unless you have access to that email.
Also, create your own Facebook account and go online and take screen shots of his page BEFORE you do any of the above and BEFORE you "friend" him. See who his friends are. See what kind of comments he is making.
Also, schedule the polygraph. He offered. Do it. He was probably bluffing.
Look for skype on his phone or computer or other chat programs that won't show up on your phone bill. Also, do a search for pictures hidden away.
t/j someone asked if there is a HPV test for men. For women they can swab and test for it even when there are no lesions. For men they can not test for it unless they have a lesion to biopsy.
HPV50, there is something you need to start thinking about. RIght now you are focused on investigating. But you need to realize that if you do discover absolute proof that your WH has cheated, what will you do?
If it turns out he is cheating or did while you were out of the country, then everything he is doing right now is unbelievably low:
1. He would know he gave you a STD, but has told you a lie to prevent you from getting further tested for any other STDs. Basically, his dirty secret is worth more than your life and health.
2. He is going to MC with you, supposedly to strengthen your M, but he is in an affair. He is using that as a cover.
3. He has taken off his wedding band as a rejection of your M.
4. He is actively lying and hiding things.
Will you be able to R considering all of this? Do you even want to?