The policy is no.

If sitting together is so important and J is "wide open" why not book both into J and be certain that the two will be together?

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I guess the ladyfriend won't get a chance to travel CX F then

tsk tsk tsk... You don't understand the mind of the cascade. As much as cascade likes his gf, he likes his First Class seat better.

Appreciate the insight, hehe. We ended up just extending the trip a few extra days and are now returning on a weekday instead of a weekend, and that day has two F seats available. First world problems I guess

good move. enjoy sitting and eating together, it looks like quite a treat to share a meal with someone on F. I sent my parents in F a while back and they had an absolute blast. it seems like one of those things that by doubling the people you get >2 the enjoyment of what's already an extremely pleasant flying experience.

And enjoy the First Class toilets. It's huge and amazing. Both of u can perform your "conjugal duties" in the toilets and join the Mile High Club.

I accidentally used the F bathroom once, it was a config that the bathroom is very close to first row J. It was NICE! But the FA immediately asked me not to do it again, I explained it's an accident and she said she knows many J made that mistake...

Do you mean a 744? Yes, it is very easy to get to the F bathroom easily. My mother-in-law did that once. The FAs did not say anything probably because of her age.

There were a a few occasions when I waited for Y/PEY bathrooms, the FAs invited me to use the J bathrooms, but I guess they knew J bathrooms would not be fully occupied.

Back to the topic, passengers are not allowed to visit a higher class cabin in general. However, there can be rare exceptions. I took my mother-in-law to US in May. I could only get her a F award (no J award availability). She needed wheel chair assistance. The ISM told me that I could move to an empty seat in the F cabin about 30 min before landing to disembark with her. My mother-in-law also asked to see me about 30 min into the flight. The FAs were very nice to take me to the F cabin, but I was only there for less than a minute.

There are always exceptions.

"conjugal visits" is not a good reason. The F passenger can visit his/her spouse in the J cabin instead - while not encouraged, FAs will normally have no problem. Exceptions should be based on better reasons.

Besides, it is against US laws to fornicate on the plane. If CX reports you to local police (US-bound flight) you will be arrested.

Asian airlines tend to be a bit more stricter and "by the book" when it comes to traversing into F territory if you're not actually seated there. They may accommodate you for a short visit to see someone but that's about it. I once unwittingly wandered into F from J on an EY flight after waking from deep slumber on an overnight JFK-AUH flight and used the toilet, not realizing that this was only for F pax use. Once I got out the flight attendant told me off and requested I only use the toilets for J.
On AA I was in J and my friend was in F (NRT-DFW), they had no problems for me to come and visit him (once he gave permission of course) and sat there for 2 hours chatting, and even poured me wine from F. I guess each airline has it's own policies of how lenient they may be on these matters but by and large the Asian airlines enforce their policy quite strictly.

Thanks for all for the information, I was wondering the same thing about inviting the lower class into F territory. I mean inviting family sitting in J up to F for a visit. Haha

I know that FA's hate when PAX come forward into a premium cabin that they are not seated in.

I know that PAX hate when PAX come forward into a premium cabin that they are not seated in.

Worse yet is when a family has the parent(s) in a premium cabin and their child(ren) are ticketed in a lesser cabin. The child(ren) come forward and annoy the other pax in the premium cabin with their endless visitations.