1. Not kissing
Believe it or not, many people (and this includes women) don't kiss their partner when they're having sex. Why? Perhaps because the positioning doesn't allow for it or they are too eager to climax and feel that it might break the rhythm. Nevertheless, it is highly recommended that you make an effort to kiss your partner during the act - it will only add to the experience.
2. Biting before your partner's ready
While many people enjoy an aggressive partner, biting any part of their body before they are aroused may lead to pain and discomfort (and might even lessen the chances of any further action ) or simply scare them off. So make sure your partner is fully excited before you bite their ear, shoulders, neck or any other part of their body.
3. Ignoring everything but sexualised parts
Genitals are great, no doubt, but you should definitely pay attention to other parts of your lover's body and focus for some time on their entire body - knees, wrists, back and stomach are highly erogenous zones for men as well as women. Gently caressing these areas will help excite your partner further; in turn, increasing the chances of them pleasuring you back.
4. Putting your weight on your partner
Even if you're a girl! It's okay to lose yourself in the moment every once in a while and go crazy on your lover. But when you're lying on top of them, you have to be careful not to drop your weight on them. Chocking them or hindering their ability to breathe will anyway kill the moment and any chances of some good action.
5. Climaxing too soon/ too late
This one is especially for men. You need to have good control on your muscles to ensure that you can ejaculate at an appropriate time. Too soon and you may leave your partner unsatisfied; too late and it might leave your partner feeling as if they're pumping iron at the gym. To avoid this, spend a lot more time on foreplay (this will help men as well as women). If you take too long and can only ejaculate via manual stimulation, do your best to get your partner to orgasm and then they can return you the favour.
6. Not warning your partner before you climax
If you're going to let go - and this applies even to women - whether during oral sex or intercourse, you need to tell your partner beforehand. Something as simple as "I'm going to let go," will suffice. Your partner deserves to know.
7. Treating sex like porn
8. Staying quiet
It may feel comfortable to you to pump away like you do at the gym, but you'll quickly discover that most people don't enjoy such an act. Mix it up a little bit; go fast at times, then slowly. Be creative and you'll find yourself enjoying some variation too.