If you're in a relationship with us and it's not a one time thing, don't fake it.
Don't make us think you enjoy something when you don't.
Don't try to build us up by lying to us about sex.
Don't have sex with me when you don't want it.
I've found out that I suck at sex in the past and actually knowing the honest truth has made me much better. I felt so humiliated that I was failing and my girlfriend was just putting up with it.
Learn how to calmly, assertively and positively guide your partner to find what makes you happy. It's a crucial life skill. Don't be afraid to ask for what you want.