Adult Intimate Sketches/artists needed

Needed artists ans sketches for a forthcoming Self help book. It involves improving marital realations thru better sexual technique. I need about 40-60 Sketches of couples/male/females as per my specifications, THe sketches have to be as idescrible and will be of couples engaged in Intimate sexual acts like kissing, different positions of sexual intercourse, nude drawings etc. The rights to use the sketches as per my requirements will rest with me and i wil want a contract/certificate from the artist. I can give name(s) in the credits section if u so desire. I wil need to see at least 2-3 samples be4 I accept a bid and so those who can not provide samples need not bid. the acyual amout paid may be even more than the bid amount if I like the work. a sample sketch is ttached herewith. please bid at his time for a set of 20 sketches in about A4 size. Plz clarify any doubts be4 bidding.