My husband doesn't like strip clubs, well the idea of them.
So he has never been. If a man goes to strip clubs but claims he doesn't like them the obvious question is.... why does he go?
I wouldn't be too comfortable with dh going to Amsterdam. I have never had any reason not to trust him, I know he would never sleep with a prostitute as he has too much respect for women, but I'm human and I'm quite an insecure person so while logically I know I wouldn't have much to worry about my past experiences and insecurity would make me uncomfortable.
Insecurity is often looked down upon on MN and it is always claimed to be as simple as you either trust him or you don't, but past experiences from childhood or whatever sometimes makes people insecure about these type of situations. More people probably would be uncomfortable with it then they care to admit. I never think it is as black and white as 'you either trust him or you don't'.
If I had a pound for every time someone said they trust their partner and then found out they were cheated on I would be rich, so there would always be that tiny part of me that would worry that I'm one of those people who trust their husband's to always be a decent person and do the right thing, because pretty much everyone who has been cheated on believed that of their partner once as well.
DH would never ever dream of going anyway so it won't ever come up.