Here's my approach to this, as a dude:

I mean, really I don't have a broad preference for or against bush at all...

... but, if you want me to smooch things down there, please tidy up a bit.

I just don't like having a mouth full of hair.

Don't worry, I will tidy up too, for the reverse scenario, if partner also dislikes mouthful of hair, and! ... this also applies to my facial hair... I'm not that attached to it, and it will grow back, if you want to smooch my face but don't like the beard/stache.

Maybe I am lucky in that I at least I think I look decent both with or without a beard/stache.

This is to me completely fair and reciprocal, and ... really is not that conplicated.