Is it ok to ask your older sister about first night advice if you are a guy?

I'd think your older sister would be the best person to ask.





She is a girl, after all, and I presume you are dating a girl.Is it ok to ask your older sister about first night advice if you are a guy?
The fact you are asking this question means you aren't comfortable enough to do it in the first place without some sort of external nudge. This would lead me to believe you don't have that sort of relationship with your older sister.





However, here is your nudge. It is perfectly fine.