[ditojim]

perhaps some kind of spray-on film that peels off easy when finished but won't break and is hella flexible.

[hooo]

Not sure how that would be better. Now you'd get condom spray all over the place.

[javis]

And I think some guys would be reluctant to spray anything directly at it.

[hp50g]

Yes this is something you learn not to do by accidental deodorant spray :) ouch!

[ufo]

A big problem with sprays is that they are cold.

[Evbn]

Chemistry can create heat.

[TheSilentMan]

In addition to the other issues brought up, there's the problem of pubic hair getting stuck in the film reducing it's effectiveness and making removal painful.

[Evbn]

Make it soluble in a complementary gel.