Put a sigil of Beleth on a piece of A4 (8.5 x 11’) paper. Beleth has 2 sigils: one to bring the love of women, another to bring the love of men.
On top of that, put a white penis candle. Carve your friend’s name into it with a needle. Anoint the candle with Kiss Me Now oil if your guy just wants one-night stands, or Come To Me oil if he wants a certain someone.
It would really help if you had a personal item of the guy, like a photo or even better yet his dirty drawers. Cut out the crotch part to use that. Or you could get some of his nail clippings, hair, blood, or semen, that would be ideal for this. Either way, put any of those in a small paper envelope and put under the candle.
Light the candle, conjure Beleth, and tell the djinn to bring your guy enough women to satisfy him.
See how that goes and report back when something happens.