Considering the benefits (more strength to kill more goblins), it'd be uncharacteristic for him to refuse the offer. Besides, the girls already gave their consent.
The so-called Miracle of Sexual Intercourse:
The word "miracle" here is used to refer to divine DnD-style spells.Would all of you care to participate?both parties will gain a blessing that confers a permanent ability boost should the man ejaculate inside.When a man engages in sexual congress with a virgin whom he has a close relationship withwhile being blessed with divine protection,staaaaaaarethen I don't mind.If it's for the sake of defeating goblins,Of course!Yes~I'll join!By all means allow me to participate!