Not at all, you wait for them to bring it up if anything. All I want to do is get them out in person, anything that could be detrimental to that I stay away from.
FYI I'm talking about before meeting and you are in the texting/messaging phase.
Once they are in front of me then it's the time to act and be sexual, not online.
in my experience, there are girls who are going to think you're a creep or a pervert if you bring up sex, but I can't say I thought any single one of those girls was ever going to have sex with me. (think of it like this, if a gay man wants to talk to you about sucking ****, you're gonna be like ewww no wtf, which reflects your complete lack of desire to blow him. )
there are girls who are going to tell you something that lets you know that you don't want to bother having sex with them anyway, which in my case is whenever a girl reveals herself to be so closed minded she only wants to do the things she already likes that get her off, with no thought to anything else. (these girls could only be pump and dumps anyway), but in the case of someone else, she could accidentally reveal herself to be a huge slvt who banged 2 dozen guys already and that could turn you off
there are girls who are going to play coy, tease you, imply something, etc. when the topic of sex comes up. these girls most likely are trying to play the good girl but ready for some fun
and finally, there are the girls that will just outright tell you they can suck a golf ball through a garden hose and once had sex for 8 hours straight because she was bored on a sunday, these are the best kind by far.