Cliches in smut

Most of these are my preferences, though a few are dead on.

*Starting the smut section with a blowjob.  Common in doujins.  Mostly my preference to avoid them.  I just don't really like them very much.  At all.  Like if you told me to jump a bridge or write a blowjob scene, I would get my bungee jumping gear and dive away.

*Dirty talk when it is not needed/first timers.  It should only be done if the sex is one-sided or the characters have already tied the knot several times prior.  Alternatively can be done if character is losing him/herself in pleasure.

*If possible, find other ways to say dick instead of dick/penis for a challenge (I need to follow this advice).

*Diving straight into smut without any explanation prior.  It's ok if it's a backstory later on.  This is VERY common in most doujins.

*Ignoring/defying plot/going out-of-your-way for smut.  Seriously, just don't.

There are probably more, but I can't remember off the top of my head.  List may go on.