A few interesting ideas to spice up section 6.6 on Reproduction.
An interesting Podcast with Carl Zimmer on the origin of sexual reproduction.
Book The red queen: Sex and the Evolution of Human Nature by Matt Ridley.
This reminds me of another one by Olivia Judson: Dr Tatiana’s Sex Advice to all creation.
Also in the New Scientist. Everything you always wanted to know about female ejaculation (but were afraid to ask)