The Sex Adventures of the Three Musketeers (1971)

A young d'Artagnan sets off to join the Musketeers and along the way encounters several able and willing beautiful women who cannot wait to teach our would-be warrior how to wield his weapon. From the start, peasant girl Yvonne has her eye on him and has a couple of romps in the corn field. The three Musketeers also get their share of female flesh with the barmaids.