In reply to fire_munki:
Before you end up splitting up with your gf (as a result of your taking her climbing) have you asked her if she wants to go climbing and if she said yes, did she mean:
1. Yes - I have always wanted to try climbing and this will be the perfect opportunity for me.
2. Yes - you are so insistent that we go climbing that I am going to say yes to shut you up, but you are in trouble if I don't like it.
If 2, I suggest you allow her to trail her finger in the lake as you row her around. That or the pencil museum!
Have fun!