Roleplay is ultimately going to be what you want it to be - no one is going to force you into ERP or push boundaries you aren't comfortable with (luckily you can blacklist if they try). In that same vein, you have to be respectful about what others want to play since it's a hobby and people will generally play what they want to play. So you don't want to cultivate that sort of dynamic in your storyline - don't! However, I wouldn't place a sweeping generalization on a hobby that has always, and will always, have the opportunity to fall into ERP territory, much like a story line can fall into aspects of horror, painful emotional confict, romance, comedy, etc, etc, etc..Â
RP is what you make it depending on your preferences, chosen partners, and what themes/plot points you choose to implement, and it shouldn't matter what the community as a whole plays because it's an aspect that will always be there, and prominently. If you feel awkward, do not participate in it! However, a character being sexually active doesn't make them any less interesting or relevant - they're just small parts to a whole, nuances that shouldn't matter in the long run, and judging characters based on whether they're looking for a partner or not might lead you to missing out on great interactions.
RP is what you make it depending on your preferences, chosen partners, and what themes/plot points you choose to implement, and it shouldn't matter what the community as a whole plays because it's an aspect that will always be there, and prominently. If you feel awkward, do not participate in it! However, a character being sexually active doesn't make them any less interesting or relevant - they're just small parts to a whole, nuances that shouldn't matter in the long run, and judging characters based on whether they're looking for a partner or not might lead you to missing out on great interactions.