My boyfriend is the same age as I am (26) and I’m worried about him. Our sex life is great. But once it’s over, he suddenly changes. He becomes really depressed. He’s even cried a couple of times and then leaves a sad man. I’m used to men turning over and going to sleep after sex, but his behaviour is weird, to say the least. Do you think he has hormonal problems?

Linda, by e-mail.