I'm a Phoenix Bloodline Sorcerer. The Bloodline Arcana ability reads:

When casting any spell that deals fire damage, you can instead heal your targets. The spell deals no damage, and living creatures affected by the spell instead regain a number of hit points equal to half the fire damage the spell would normally deal.

Which sounds great. I know that if I use a Fireball, there is a rule that lets my party "fail" their saving throws:

Voluntarily Giving up a Saving Throw
A creature can voluntarily forgo a saving throw and willingly accept a spell’s result. Even a character with a special resistance to magic can suppress this quality.

However, I can't find a rule that lets them be "hit" by a spell like Scorching Ray (which requires a ranged touch attack) when they choose to. Does such a rule exist, either in RAW, supplementary, or dev commmentary?

I'm a Phoenix Bloodline Sorcerer. The Bloodline Arcana ability reads:

When casting any spell that deals fire damage, you can instead heal your targets. The spell deals no damage, and living creatures affected by the spell instead regain a number of hit points equal to half the fire damage the spell would normally deal.

Which sounds great. I know that if I use a Fireball, there is a rule that lets my party "fail" their saving throws:

Voluntarily Giving up a Saving Throw
A creature can voluntarily forgo a saving throw and willingly accept a spell’s result. Even a character with a special resistance to magic can suppress this quality.

However, I can't find a rule that lets them be "hit" by a spell like Scorching Ray (which requires a ranged touch attack) when they choose to. Is there any official rule to enable this?