In Germany it cannot be considered rape if there is no sign of force.
The word 'rape' used to mean that force was involved - that's how it was when I was growing up (not so long ago, but long enough). Rape was having sex with someone against their wishes - consent was implied by actions and for most people if they heard 'no' then they stopped. There was a world of difference between that and getting lucky after a few drinks with a girl who had also had a few. Now it seems to apply to any woman who has had sex and regretted it, fallen out with the chap, etc. The word 'rape' has been diminished by the ever-greater scope given to such a charge.
The number of people who are going to grab someone off the street and rape them is relatively small. Most people are fundamentally decent. This issue of consent is something that really cannot usually be proven, other than by signs of force. Yet the accusation can be sufficient to damage a person's reputation and career as the identity of the accused is not protected. The danger is now that if a woman says she was raped and there is evidence of having had sex with the accused (but no sign of force) then he can still be convicted? That would seem rather 'anti-men' if true, and a lot of men are feeling that vibe in society at present. A few bad men doesn't make all men potential rapists, etc, yet that seems to be the presumption. Witness the swimming pool where they have a 'safe time', defined by no adult males being allowed in.
If a person wasn't forced because they were drunk and it seemed like a good idea at the time then hopefully they will learn not to put themselves in situations where they might not like the consequence in the cold and sober light of day. That's about all that should happen - look to yourself instead of others. Waking up the next day with cuts and bruises, having obviously been forced, is clearly a different matter. I say 'clearly', yet it is becoming less so and this can only cause a further divide between the sexes.
The point about drugs (which would therefore possibly leave no sign of force) is a bit of a red-herring. Firstly, there would very possibly be signs of the drug in a person's system, or at least for a certain period of time. Secondly, we knew when I was young to watch out for stuff being put in drinks in clubs, etc. Lastly, you cannot clumsily legislate for the entirety of society because of something that happens so very rarely. You can come up with all manner of scenarios but if you legislate for every eventuality you end up with an absolute mess of a legal system, which is where we are heading.
With regard to the points about women dressing how they want, of course they can. If they walk around with everything on show they are going to get attention - that's why they do it. Unfortunately they are not going to like some of the attention that they get - that's called a consequence.