They aren't insecure restrictions though, it's just not something I would be happy with and the same with her. Not being able to at least attempt to alter part of the relationship you have with a friend (like sharing a bed with them) only speaks to a not very strong relationship with your partner imo. If my partner wasn't happy with it then I doubt we would be together as she wouldn't be happy. No one said anything about going for coffee with a male friend - that's a bit different from sharing a bed!
To each his own, and whatever works in your relationship. If you both have the same kind of opinions, then it's moot, and all that matters. Having said that, placing insecure restrictions on someone isn't a great sign of a strong relationship either. If your partner is happy with it, then sure, that's cool. But what if they're not? If I was in a relationship with someone and they felt I couldn't share a bed with my gay best friend or that I couldn't go for coffee with a male friend, it sure as fuck wouldn't be a "strong relationship".
Because doing something your partner doesn't feel happy with when there is absolutely no need to isn't the sign of a strong partnership.
Do you enforce this same restriction on her regarding her female friends?
How exactly does it damage the "sanctity of the relationship"?
Couldn't live like that myself, but I never understood people stuck in restrictive relationships.
And I take serious offence to the bullshit that is 'restrictive relationship'. If you can't manage to avoid sharing a bed with other guys when you are in a relationship - no matter how fabulously gay these people are - then your relationship is clearly not very close.