Post for those who like: 16:9, 1boy, 1girls, 3d, 3d (artwork), etc.
Regular 16:9
1boy
1girls
3d
3d (artwork)
alyx vance
apc
ar2
armor
bald
barney calhoun
black hair
boots
bulletproof vest
civil protection (half-life series)
clothed
clothed female
clothed male
clothed sex
clothes
clothing
combine (half-life series)
combine assassin (half-life series)
combine elite (half-life series)
dominant
dominant female
dominant male
domination
erect penis
erection
female
gas mask
gun
half-life (series)
half-life 2
half-life 2 beta
helmet
hi res
high resolution
highres
holding
holding gun
holding object
holding penis
holding weapon
human
human female
human male
human only
humanoid
jeans
knee boots
kneeling
light-skinned male
light skin
male
male/female
mask
masked
masked female
masked male
oral
oral sex
pale-skinned male
pale skin
particle ghost
penis
reverse rape
rifle
sex
sitting
sitting on lap
sitting on penis
sitting on person
sniper
sniper rifle
source filmmaker
straight
transhuman
unknown artist
valve
vehicle
vest
weapon