After noticing him returning from a 3 week trip out of state, he began acting very strange. He no longer sleeps in their room, started smoking,dressing differently and in general not acting like himself.He has initiated sex with his wife daily from their normal of 2-3 times per week, however, he is wanting to do really weird sex like oral,anal and positions that would require her to be a bronze medalist in gymnastics to perform.

Any thoughts? Is it possible he is having some kind of nervous breakdown? Demon possession? My friends say he is probably cheating but I have asked him and he denies it.I have no reason to not believe him he has never lied to me before.I am just really confused at this drastic behavior change.We have been married almost 19 years.Any thoughts?

She has been very boring lately!