The invitation 'to make love on february 11th 1978, at 22:00 hours', printed in black ink and signed by Boezem, was sent to about 350 people in the Netherlands and abroad, who worked in various fields in the artworld. The names of all the addressees are noted in a block of text on the invitation. The time frame for this worldwide action, which must be considered a sculpture, is precisely fixed by Boezem, and authorized by means of his signature.