Answer the add, do you want to sleep with him?

so if he is Bi will that change your friendship? Really then if you are true friend his sexual preferences should never be a concern. A true friend is some one you love and and will stand up for no matter what.
Cheers

Sorry I guess I should have said that the add said she was looking for a guy for him. And gave a list of his type.

Good point Matt's Wife. However, I favor the direct approach.

Firstly, you could answer his ad and say, "Hi, it's good to see a friend on the site. I enjoy checking out the ads and now I know I have a friend with similar interests." That will open the window for a conversation.

On the other hand, if he's on the site he knows people are looking at it. You might open a conversation with him about seeing his add and it will lead to a discussion that will answer all your questions.

Either way, Good luck.

From Matt's Wife: How does that mean he is Bi? Maybe it is about pleasing his woman