While reading the Individual Program of my wife, I thought: why should I, a man, act out such childish behavior? After all, my goal is for her to see her “soul mate” in me, correct?

Yes, you are right, in order for the other person to feel that you are his/her “soul mate,” to see in you  his/her “second self,” then you must act like an individual from the description of his/her Individual Program. Even if you are not too comfortable acting out qualities of this individual, or these qualities are not characteristic of you personally, or you do not like them. And, you are absolutely correct in your suppositions that, int the case of this individual, you will have to act out behavior of a child.

In order for a person to really feel that you are his/her “soul mate,” it is necessary to transmit the whole Manipulation Mode (or the Individual Program, as in your case) in its entirety; and, not just one quality of personality (in your case, it is childish behavior), or several qualities. Acting in such way is a big mistake.

If you act out only some separate qualities toward a person, and not the role (manipulation scenario) as a whole, “from A to Z,” then with such acting the effect from the influence will be short-term and unstable, if any at all.