deimplying some sex poses of sex_from_behind

BUR #7374 has been approved by @nonamethanks.

remove implication reverse_upright_straddle -> sex_from_behind
remove implication reverse_cowgirl_position -> sex_from_behind
remove implication reverse_suspended_congress -> sex_from_behind
remove implication doggystyle -> sex_from_behind
remove implication prone_bone -> sex_from_behind

Previous: topic #19319

These are "sex positions", but it's possible to put two characters in these poses without any penetrative sex occurring. As a result, many posts are being mistagged with sex. Here are a few examples of this for each position (obviously nsfw):

• reverse_upright_straddle: post #4551249, post #4421229, post #3336860, post #612844
• reverse_cowgirl_position: post #4207203, post #4111075, post #2304207, post #1380795
• reverse_suspended_congress: post #4824501, post #4788709, post #4331044, post #1445929

The alternative is making precursor tags like imminent_reverse_suspended_congress, but I'm not sure how popular that would be.

You should add doggystyle and prone bone to this. The implication has caused numerous thigh_sex and buttjob posts to be tagged sex despite a total lack of penetration.

Yeah, I noticed this too unfortunately. It'll be annoying to keep sex from behind populated but it's undeniable there are cases where sex does not apply and these do, like after sex or imminent penetration.

The bulk update request #7374 (forum #197473) has been approved by @nonamethanks.

Wouldn't it work to rename sex_from_behind to something like "from_behind_position" so that it still applies in cases where "actual sex" doesn't happen, and then deimply sex from it?