We hear Richard finishing giving Andrew the "birds and bees" lecture. Andrew then asks if people actually do that (have sex) and then wonders if its an obligation or requirement of marriage. After Richard says that its an enjoyable act, Andrew then asks if it feels good for both parties. Richard answers that in an ideal world it does and that married couples do it as often as they can, or at least at first. Andrew then shows concern that millions of sperm die with each act, and then finishes by stating that it appears to him that the whole act is "messy."
Later on, Andrew talks about becoming a 'real man' and how he will be able to have sex. This is not discussed in great detail.
A teenager and rough looking teen biker kiss beside his motorbike. The girls mom/dad comes out and tells her to stop, then she makes tells the parent to give her some money so that they can do it in a hotel in private.
Andrew is being performed on, and is implied that he is completely naked.
Andrew and Portia kiss at least two times.
Andrew, at some point, gains a reproductive system.
It is implied that Andrew and Portia have sex many times. In one scene, we see nothing but them lying on a bed, while Andrew is clothed and Portia is not, but nudity is covered strategically.
Many instances on marriage.