One of my biggest weaknesses has to be coming across a sexual guy. I've never felt my attractiveness was a problem, and I find socialising with women very easy, but I feel that they don't look at me as someone who could give them a great time in bed. I wouldn't categorise myself as a "nice guy", but I clearly am not doing enough to assert my dominance, and I really need help fixing this.

What makes guys seem sexual then? Being manly, attractive, surrounded by women, comfortable with sexual discussions, etc.

If you are attractive, then look and dress the part. That's half the battle. You also have to project sexuality. You have to flirt, you have to openly discuss sex. If you are not sexually experienced, then you need to pretend to be. There is no way that a women would think you aren't good in bed if you are good looking and you are open about your sexual experiences.

Here's a tip. Ask her if she's ever been in a threesome? This works on several levels. If she says yes, then awesome, hopefully she'll be in another one with you one day. Either way, she'll more than likely ask if you have too. You'll need to say you have even if you haven't. This shows that you are a pimp and you are desired by multiple women. Then you are sexually qualified in her eyes.

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“Nothing is impossible, the word itself says 'I'm possible'!” ~Audrey Hepburn