I always recite a pledge while on my knees to Mistress upon arrival:
“I pledge to be an absolute, obedient and perfect slave to Mistress. She owns my cum and there is nothing I can do about it except beg. All of life comes to me with ease, joy and gratitude when I am serving Mistress.
Mistress is superior in every way. Mistress makes all of the rules. I pledge to follow those rules.
I pledge not to cum with anyone else and my dick will go limp in the presence of all others except as directed by Mistress.
I pledge to love the taste of my cum and swallow every drop as it is the ultimate gift from Mistress.”
That is it. It works for us and Mistress loves it.