It's not so much the case on here, but this is a real factor.
When a female gets on a "traditionally male hobby" forum, such as a pipe smoking forum or a knife forum, she often gets lots of attention.
When guys see a girl into such a hobby. we do get quite intrigued. Ladies on such forums often use a gender neutral username since they know the guys will be like, "Wow, a guuurl."
Sorry ladies, we just think it's neat to be able to talk about such things with a lady. To find a woman with shared interests, even if it's just to talk to, is awesome. Especially if it's rare to find a lady into such things.
Most guys on here have at one time in their lives wanted a woman to do lot's of drugs with, so it's likely a factor here as well.
There is always sexual tension and thoughts. It is what it is. If we're respectful and don't stare at your tits too much, deal with it.