Homosexuell Perle Halskette
"Pearl necklace" is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Such ejaculation can follow mammary intercourse, fellatio, intercourse, or masturbation over the other person. The term originates from the way the deposited semen resembles a necklace of translucent white pearls.
Learn more about pearl necklaces from Wikipedia.
the glorious culmination of [pec]-fucking, in which you blow your nuts out all over a [guy]'s [pecs], shoulders, neck, and, with any luck, chin. one of the highest expressions of love and affection bestowable upon a [bottom] by a [top].
Dashing Gent: Hey, I bet you'd look good in a "pearl necklace."
[Dreamboat with Big Pecs]: Why, yes, I supposed you're right. Why don't you come on over to my place and baste my torpedo [pecs] and elegant neck with your steaming hot man goo?
Source: Urban Dictionary