My DSS is 14 and coming to stay for xmas. DH have agreed it's time for the talk - have checked with DSS's mum this is ok and now DH and I aren't sure what to include. DH wants to focus on the mechanics of sex, but I want him to cover relationships, respect for self and partner, when 'no means no' and so on. DH even suggested I talk to DSS but I think it's a father/son thing. Any tips/suggestions/thoughts?