Who would have fallen?

[obloquy]

Originally Posted by Groin Redbeard

That doesn’t mean that he would succumb to those temptations. Just because he was subject to the Ring dose not mean he would fall for it.

Wickli was making a joke, implying that Gandalf's spirit might not have been all that potent after all.

The question of whether Gandalf was succeptible to sexual temptation seems easily answered (cf. Wickli's own references), but it's entirely beside my initial point, which was merely that Gandalf is most assuredly not sexless: he is male, in temperament and in body.