I see guys coming out of the massage parlors looking extremely happy, so I'm thinking of giving it a go.  My wife is oblivious.
Oh wow, don't do that. Do you want to risk your marriage for a massage?
Sure, I fantasize about erotic massage. It looks great.
Wanting to experience new things is okay as long as you discuss it with your wife. When she finds out that you kept it from her, your marriage will be in danger.
I have not discussed this with her, but I'm sure she won't mind.
I don't think I would make such an assumption about how she would feel about this. Most wives wouldn't be okay with their husband getting an erotic massage. You'll definitely want to check with her first.